Prevent users from submitting the form when both fields data are not the same

I would like to ask the following type of question.

1. HOW MANY FRUITS DID YOU EAT TODAY? [_X_]

2. HOW MANY OF EACH FRUIT?
Apples [_a_]
Bananas [_b_]
Oranges [_c_]
Watermelon [_d_]

And I want it so that they cannot submit the form unless (a + b + c + d = X)

With the calculation and conditions tools available, is this possible?

PS. The form I'm trying to do this for is here, and it's the final prompt about identifying primary professions.

Hi,

We will look into this one and get back to if we find the possible way. I've tried using math functions, but no luck so far.

Thanks

@ couragerenewal

Hi,

It is actually possible using Calculation and Condition.

Please test this form http://www.jotform.me/form/41597190072456

In my demo form, you have to make sure that the total of All individual fruits should match the "fruits eaten"

Example:

Hope this help. Inform us if you need further assistance.

Thanks!

Btw, I should have shared also the calculation and condition I did. So, here it was

Calculation:

I calculated the total of each individual fruits and then substract it to "fruits eaten"

Conditions:

If the Calculation is equal to zero(0), that is.. "fruits eaten" - "each fruit" = 0   then I show the Submit button

Thanks!

Beautiful! Incredibly helpful response. I just replicated these calculations and conditions on my form and it works like a charm. Thank you.