One week Roger earned $425.50 regular pay and $60.50 overtime pay. His net pay for the week was $275.30. How much did he have withheld for deductions?

i don't know how to find the deduction
so far don't now if right i add
regulare pay= $425.20+$60.50=$485.70
but than do i subtract 485.70 with the net pay??