Please help me asap thank u

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Solve this problem! extra ! 3025/5.5 = a/90.75