addition to an $80 bonus, Joan earned $8 per hour working last week. Joan’s total earnings last week were $240. How many total hours did she work last week?

A missionary commissioned to South Africa had to exchange his $400 for the South African Rand which is worth 14.25 for every dollar. How many Rand did he have after the exchange?

Jennifer works as a teacher's aide and makes $850 on a bi-weekly basis. What is her average monthly income?

Patty works at a pet store. Last week she earned $45. She makes $5 an hour. Mrs. Sanchez paid her an extra $10 for clipping her garden hedge. How many hours did Patty work at the pet store?

Nina deposited $20.59 in her checking account. Later that week, she wrote a check for one third the amount in the account, and then another check for $9.74. If she had $108.60 left in her account, how much did she have to begin with?