Assume that during the years 2022 to 2025 Woodland Republic could produce only two commodities: tractors and rice. Also, assume that Woodland Republiccan procuce at any of the positions represented by the production possibility schedule below.

	A	B	C	D	E	F	G	H
Tractors	0	2	4	7	9	11	13	14
Rice (in tons)	100	95	85	70	60	50	30	0

Suppose in 2022 the economy is producing at point D. What is the opportunity cost of producing 6 more tractors in 2023