# Calculation in jquery

Trying to get Break Even Point (BEP) and selling value using jquery.

```function roundToTwo(num) {
return +(Math.round(num + "e+2") + "e-2");
}

\$("#cost").on("change keyup paste", function() {
var cost = Number(\$('#cost').val());
var text
var total_cost = roundToTwo(((cost * 18) / 100) + cost);

var profit = -0.5;
var sell = cost + 0.01;
while (profit <= 0) {

sell = sell + 0.01;
profit = roundToTwo(sell - total_cost);

text += "<br />New Sell " + sell + " and profit " + profit;
}
var bep = roundToTwo(sell - total_cost);
\$('#bep_display').text(bep);
document.getElementById("testing").innerHTML = text;
})```
```<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<input type="number" class="form-control" id="cost" placeholder="cost" name="cost">
<h1 id="bep_display">

</h1>
<p id="testing"></p>```

Now by running the above code, I entered 1 in the input, so the result (BEP) should be 0, but it gives `NaN`

Because your answer returns with `e` so it shows `NaN`. Try:

```var bep = parseFloat(sell - total_cost).toFixed(8);
```

This will give you the result 0.00000000.

If you need a result as 0. Add:

```bep = roundToTwo(bep);
```

```function roundToTwo(num) {
return +(Math.round(num + "e+2") + "e-2");
}

\$("#cost").on("change keyup paste", function() {
var cost = Number(\$('#cost').val());
var text
var total_cost = roundToTwo(((cost * 18) / 100) + cost);

var profit = -0.5;
var sell = cost + 0.01;
while (profit <= 0) {

sell = sell + 0.01;
profit = roundToTwo(sell - total_cost);

text += "<br />New Sell " + sell + " and profit " + profit;
}
var bep = parseFloat(sell - total_cost).toFixed(8);
bep = roundToTwo(bep);
\$('#bep_display').text(bep);
document.getElementById("testing").innerHTML = text;
})```
```<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<input type="number" class="form-control" id="cost" placeholder="cost" name="cost">
<h1 id="bep_display">

</h1>
<p id="testing"></p>```
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