сложение и умножение в javascript

String.prototype.format = function () {
  var i = 0, args = arguments;
  return this.replace(/{}/g, function () {
    return typeof args[i] != 'undefined' ? args[i++] : '';
  });
};
 
var i = 0;
document.getElementById("addRow").onclick = function() {
    var row = document.createElement("tr");
    row.innerHTML = '<table><tr><td valign=""><SELECT name="SelectMyLove" id="SelectMyLove{}" onChange="Add_option_to_select();">{% for wardrobes in wardrobes %}<option value="" size="1">{{wardrobes.title}}</option>{%endfor%}</SELECT></td><td valign=""><input type="text" id="resort{}" class="block" size="3">.руб</input></td><td><input type="text" id="resort1{}" size="3">кол/м</input></td></tr><td><button class="btn btn-success" onclick="deleteRow(this);">Удалить</button></td></table>'.format(i,i,i);
   
    document.getElementById("node").appendChild(row);
    i = i + 1;
};
var j =0;
var v = "{% for wardrobes in wardrobes %}{{wardrobes.price}},{%endfor%}";
var a = "{% for wardrobes in wardrobes %}{{wardrobes.quantity_or_meter}},{%endfor%}";
v = v.slice(0, -1)
a = a.slice(0, -1)
v = v.split(',');
a = a.split(',');
function Add_option_to_select()
{
   var CountryObj = document.getElementById("SelectMyLove{}".format(j));
   var ResortObj = document.getElementById("resort{}".format(j));
   var selind = CountryObj.options.selectedIndex;
   console.log(v)
    ResortObj.value = v[selind];
    console.log(j);
 
   var CountryObj1 = document.getElementById("SelectMyLove{}".format(j));
   var ResortObj1 = document.getElementById("resort1{}".format(j));
   var selind1 = CountryObj1.options.selectedIndex;
   console.log(a)
    ResortObj1.value = a[selind1];
    j = j +1;
};

let trs = document.querySelectorAll("tbody tr");
let sum = 0
trs.forEach(tr=>{ let inputs = tr.querySelectorAll("td > input"); sum = sum + inputs[0].value * inputs[1].value;});

function addition() {
 
  //эконом вариант
      let eco = document.querySelectorAll('.etceco');
      let econom1= 0;
      eco.forEach(q =>{q = parseInt(q.value);econom1 = !isNaN(q) ? econom1 + q * 5 : econom1;})
      
 // конец эконом вариант
//оптима вариант
let opt = document.querySelectorAll('.etcopt');
      let opt1= 0;
      opt.forEach(q =>{q = parseInt(q.value);opt1 = !isNaN(q) ? opt1 + q * 10 : opt1;})
 
//конец оптима вариант
//премиум вариант
let prim = document.querySelectorAll('.etcprim');
      let prim1= 0;
      prim.forEach(q =>{q = parseInt(q.value);prim1 = !isNaN(q) ? prim1 + (q * 10) : prim1;})
       //конец премиум вариант
//лофт вариант 
let loft = document.querySelectorAll('.etcloft');
      let loft1= 0;
      loft.forEach(q =>{q = parseInt(q.value);loft1 = !isNaN(q) ? loft1 + (q * 15) : loft1;})
//конец лофт вариант
 
//оборудование
 
//конец оборудования
      var a = document.getElementById('a').innerHTML;
      var b = document.getElementById('b').innerHTML;
      var odintri = document.getElementById('odintri').innerHTML;
      b = Number(b);
      a = Number(a);
      console.log(a,b);
      if (isNaN(a)==true) a=0;
      if (isNaN(b)==true) b=0;
 
      var c = a + b;
      var c = c / 2;
      document.getElementById('result').innerHTML = c;
 
      let blocks = document.querySelectorAll('.block');
      let sum = 0;
      blocks.forEach(b =>{b = parseInt(b.value);sum = !isNaN(b) ? sum + b : sum;})
      var q = (sum + econom1)*odintri;
      document.getElementById('econom').innerHTML = q;
      document.getElementById('opt').innerHTML = opt1;
      document.getElementById('prim').innerHTML = prim1;
      document.getElementById('loft').innerHTML = loft1;
 
let trs = document.querySelectorAll("tbody tr");
let sum1 = 0
trs.forEach(tr=>{ let inputs = tr.querySelectorAll("td > input"); sum1 = sum1 + inputs[0].value * inputs[1].value;});
 
    }

document.getElementById("sum-btn").addEventListener("click", function(){
    let trs = document.querySelectorAll("tbody tr");
    let sum = 0
    trs.forEach(tr=>{ let inputs = tr.querySelectorAll("td > input"); sum = sum + inputs[0].value * inputs[1].value;});
    document.getElementById("sum1").innerText = sum;
});

document.getElementById("sum-btn").addEventListener("click", function(){
    let trs = document.querySelectorAll("tbody tr");
    let sum = 0
    trs.forEach(tr=>{ let inputs = tr.querySelectorAll("td > input"); if (inputs.length) sum = sum + inputs[0].value * inputs[1].value;});
    document.getElementById("sum1").innerText = sum;
});

    console.log(resort0)
    console.log(resort10)
    console.log(sum)

document.getElementById("sum-btn").addEventListener("click", function(){
    let trs = document.querySelectorAll("tbody tr");
    console.log(trs);
    let sum = 0
    trs.forEach(tr=>{ 
        let inputs = tr.querySelectorAll("td > input"); 
        console.log(inputs); 
        if (inputs.length) { 
            sum = sum + inputs[0].value * inputs[1].value; 
            console.log(inputs[0].value, inputs[1].value);
        }
    });
    document.getElementById("sum1").innerText = sum;
});

document.getElementById("sum-btn").addEventListener("click", function(){
    let trs = document.querySelectorAll(".sum-tr");
    let sum = 0
    trs.forEach(tr=>{ let inputs = tr.querySelectorAll(".sum-input"); if (inputs.length) sum = sum + inputs[0].value * inputs[1].value;});
    document.getElementById("sum1").innerText = sum;
});

row.innerHTML = '<table><tbody><td valign=""><SELECT name="SelectMyLove" id="SelectMyLove{}" onChange="Add_option_to_select();">{% for wardrobes in wardrobes %}<option value="" size="1">{{wardrobes.title}}</option>{%endfor%}</SELECT><tr class="sum-tr"><td><input type="text" class="sum-input" id="resort{}"  size="6"></td><td><input type="text" class="sum-input" id="resort1{}" size="8"></td></tr><td><button class="btn btn-success" onclick="deleteRow(this);">Удалить</button></td></tbody></table>'.format(i,i,i);

row.innerHTML = `
    <tr>
        <td valign="123">
            <SELECT name="SelectMyLove" id="SelectMyLove{}" onChange="Add_option_to_select();">{% for wardrobes in wardrobes %}
                <option value="" size="1">{{wardrobes.title}}</option>{%endfor%}
            </SELECT>
        </td>
        <td valign=""><input type="text" class="sum-input" id="resort{}"  size="6"></td>
        <td><input type="text" class="sum-input" id="resort1{}" size="8"></td>
        <td><button class="btn btn-success" onclick="deleteRow(this);">Удалить</button></td>
    </tr>`.format(i,i,i);
 
    row.classList.add("sum-tr");