In one hour, Sue can produce 40 caps or 4 jackets, and Tessa can produce 20 caps or 4 jackets. Sue and Tessa are to trade 1 jacket for 15 caps because o not willing: Tessa can produce 1 jacket at an opportunity cost of 4 caps o willing: Sue can produce jackets at an opportunity cost of 1 jacket for 10 caps o not willing: Sue can produce jackets at an opportunity cost of 1 jacket for 10 caps o willing: Tessa can produce 1 jacket at an opportunity cost of 4 caps