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C(x) = 105x + 300,000 (a) Find the average cost function C. C ( x ) = (b) Find the marginal average cost function C'. C' ( x ) = (c) What happens to C(x) when x is very large? lim C(x) = * +00 Interpret your results. O This value is what the production level approaches if the average cost per unit is very high. O This value is what the average cost per unit approaches if the production level is very high. O This value is what the production level approaches if the average cost per unit is very low. O This value is what the average cost per unit approaches if the production level is very low