I have a working system for giving employees an opportunity to track their goal progress on a week to week/monthly basis. I've now protected all cells except the 'Monthly Admission Goal' and grid spaces that correspond to specific monthly calendar work days (currently filled with zeros).
One issue though, if a zero is deleted from the grid and not replaced with another numeric value...I need it to default back to zero. The zero entry is vital to the COUNT function and if an employee removes one, leaving it blank, and forgets to replace with their desired number or back with a zero it throws the whole thing off. This has to be a fairly common requirement and should be an easy enough but can't seem to find the right Google search terms to correct this. See below link for example image.
=IFERROR(VALUE(A1);0)
(e.g, setting 0 as default, change for any other value), then use the value in A2 in your calculations.