Need this asap ! 100 points

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Hi, can anyone show me how to do this problem? 100 points for this. in advance