Trying to change the output value of a checkbox when checked IF 1 of 3 other checkboxes is checked.

[rebeccat3337731]

I am trying to edit an existing form with multiple checkboxes and calculations.

I had to add a new checkbox for an additional product.

Default price/value for this new product is "900", BUT if 1 of 3 other product checkboxes are checked, then the value needs to change to "650" (i.e. discount).

These values, along with others in the form, feed into a "Totals" calculation.

I have little to no experience with Javascript. I have thus far been able to figure out how to edit/modify existing JS, BUT having a rough time with creating this new JS.

Would the script need to be added to the checkbox with conditional values output? Or..

To the Totals calculation to check IF A + B, A + C, or A + D are checked, then value is "650", but if only A is checked, value is "900"?

OR something completely different?

Thanks!