Answer
Total cost per year for Aerobics is $781.20
Step-by-step explanation
Cost per month
Cost to join per month=$21
Cost to join per year=$21×12=$252
Transport cost per month= 9×$4.90=$44.1
Transport cost per year=$44.1×12=$529.2
Total cost per year for aerobics=cost to join per year + transport cost per year
= $529.2+$252.0=$781.20