5. PPF and opportunity costs A clothing company manufacturers only dresses and hats. with its current resources it can only manufacture the following daily combinations: 0 dresses + 20 hats 2 dresses + 19 hats 4 dresses + 18 hats 6 dresses + 16 hats 8 dresses + 10 hats 10 dresses + 0 hats Currently the company is producing 4 dresses and 10 hats when a customer order 4 dresses. What is the opportunity cost of filling this new order in terms of hats sacrificed? Type your answer as a number not a word e.g., if your answer is 3 do not type three