Fillable form calculations stopped working

I am working on a fillable order sheet with active fields of amt-1, case-price-1, with ascending numbers for each succeding amt and case-price fields, and total with total being the product of the amount x price fields. I had to use a script provided by a commenter in a couple of places where the default calculaitons would not work and it works well. I managed to get 14 lines where the total worked well with the default calculation or the script. I would update the script with the approiate fields when applying it.

Now I have hit a spot past those 14 lines in which neither the default or script calculations will work in the total field.

The script is:

var v1 = Number(this.getField("amt15").valueAsString);
var v2 = Number(this.getField("caseprice15").valueAsString);
event.value = v1 * v2;

I am facing a deadline and am now apparently dead in the water since nothing I enter seems to be working. Does anyone have any ideas?

Thsnks to those who know more than me,

Joe