Constraining already entered number

please am working on a project and i want if the data collector enters 5 acres in the farm size option and chooses crop under cultivation and put corresponding farm sizes for the crops it will not exceed the total farm size he enter ahead.production.xlsx (10.2 KB)

Hi @Just,

You first need to calculate the total area from each crop. See the modified file. Hope it is what you need.
production.xlsx (10.9 KB)

Thanks, very Helpful