So, gross pay means what you make before any deduction. In this case, Diana's gross pay is $890 before any deduction.
Deduction means that you take away this amount of money from Diana's gross pay. So, lets say that the health benefits or whatever other deduction would take away $89 from her gross pay which is $890.
This leads to her net pay, which is what is left after the deduction. This would be $801 left after the deduction.
