The primary reason for calculating productive hours paid instead of simply calculating work paid per year is that productive hours enable the manager to

Determine the number of hours available for patient care.

Explanation:

According to researcher, it is a a relative fact that out of 8hours within the day, the productive hour that can be attributed to an average employee is just 2hours and some minutes, so this productive hour is regarded as actual hours by employee in treating patient or recording above average productivity, so employers usually calculate the productive hour instead of work paid.

It should be noted that the The primary reason for calculating productive hours paid instead of simply calculating work paid per year is that productive hours enable the manager to Determine the number of hours available for patient care.

d) social security number

let me know if i am correct or not, so i can edit the answer.