20. Smiling Pizzeria, a popular fast casual dining outlet near Wittenberg University, is considering keeping the store open past the usual closing time of 6 pm until 8 pm. If the plan goes ahead, additional workers will need to be hired at a wage rate of $40 per evening session. The price of each extra pie sold is $10. Assume all pizza pies made are sold. How many workers should Smiling Pizza hire, if any? Each additional number of workers and their projected output are shown below. Hint: Complete the table

workers	Total Product	MPL	MR =P	MRP	MC
0	0	-	-	-	-
1	12		$ 10.00		$ 40.00
2	22		$ 10.00		$ 40.00
3	30		$ 10.00		$ 40.00
4	36		$ 10.00		$ 40.00
5	40		$ 10.00		$ 40.00
6	42		$ 10.00		$ 40.00