Read data and calculation

Ma Maxvl 27 Nov, 2018
Hello
​
In Read Data (Fields to retrieve):
Data10.aid
Data10.nomer
​
Calculation:
$("#nomer,#nomer1").on("change", function(){      
$("#total").val(parseFloat($("#nomer").val()) - parseFloat($("#nomer1").val()));
});
Result: Displays the value of the field nomer, and calculation is performed by the aid
​
Please what need to specify that the calculation was by the field nomer?
​
Thank
Maxvl
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