Michael earns 20% commission on his total sales at work. To pay for a new chrome book, Michael needs to earn $198 in commission. What must Marcus's sales total be for the week?
A. $1980

B. $990

C. $356.40

D. $19.80

Each weekday davina rides her bike from her house to school. after school, she rides to the library. then davina takes the same route to get home. these locations are shown on the grid below, where 1 unit on the grid represents 1 kilometer. how many kilometers does she ride each day? 10 16 20 32