Quantity of Pizzas Produced	Marginal Cost
0	--
1	$12
2	$10
3	$8
4	$5
5	$4
6	$8
7	$12

12. The pizza restaurant reflected in the table above is a firm in a perfectly competitive market. Each time the restaurant sells an additional pizza, its total revenue increases by $5. The marginal cost of producing different quantities of pizza is given in the table above. The profit-maximizing quantity of output is ________ pizzas.

Group of answer choices

6

7

4

5

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