At Cycle and Sport, customers can rent bikes, electric scooters, kayaks, canoes, or paddleboards by the hour. Mr. Thompson is renting a kayak and a paddleboard for his family. He has a coupon for 10$ off. Which expression represents the total cost for Mr. Thompson to rent a kayak for k hours and a paddleboard for p hours?
A: k(18 +22)-10 B: 18k+22p-10 C: 18k+22p+10 D: 18+22-10
Bike: $9h
Electric Scooter: $10h
Kayak: $18h
Canoe: $20h
Paddleboard: $22h
Helmet: Add $6