Using the same amount of resources, a firm can produce goods X and Y in the following combinations A, B and C:

	A	B	C
Good X	0	4	E
Good Y	F	12	10

Knowing that by switching from combination A to combination B there is an opportunity cost of 1 unit of good Y for each additional unit produced of good X, and by switching from combination C to combination B there is an opportunity cost of 2 units of good X for each additional unit produced of good Y, then the E and F values (as shown in the table above) are....