To calculate Derrick's gross pay per biweekly period, you can divide his annual salary by the number of biweekly periods in a year.
Let's assume there are 26 biweekly periods in a year:
\[ \text{Gross pay per period} = \frac{\text{Annual salary}}{\text{Number of biweekly periods}} \]
\[ \text{Gross pay per period} = \frac{56,280}{26} \]
Calculate this to find Derrick's gross pay per biweekly period.