I need help with question can anyone help me?

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

What is the mean of the data set 125, 141, 213, 155, 281

What is the approximate mark up percentage rate before m equals $1740 marked up from p equals $19,422