Question about cost measurements and marginal cost.

If fixed costs are $30, variable costs are $13.73 for three dozen cookies, labor is $10 for two dozen cookies, and revenue is $5 per dozen, is the following table showing MR, MC, and change in profit correctly?

Measures of Cost for Baking Cookies - $30 Oven (Competitive) Output (dozens of TFC (Oven TVC TR TC Profit (TR- MR Change cookies) Rental) MC TC) In Profit 30 5 18.73 5.00 5 48.73 $ (43.73) 55.00 5 18.73 ($13.73) 30 5 23.73 10.00 $ 53.73 S (43.73) $5.00 $ 5.00 50.00 30 5 28.73 15.00 5 58.73 5 (43.73) $5.00 $ 5.00 $0.00 30 5 47.46 20.00 $ 77.46 5 (57.46) $5.00 $ 18.73 ($13.73) 30 5 52.46 25.00 5 82.46 (57.46) $5.00 $ 5.00 50.00 SOOSQUAWNE 30 5 57.46 30.00 $ 87.46 (57.46) $5.00 $ 5.00 50.00 30 5 76.19 35.00 $ 106.19 (71.19) $5.00 $ 18.73 ($13.73) 30 5 81.19 40.00 $ 111.19 (71.19) $5.00 $ 5.00 50.00 30 5 86.19 45.00 $ 116.19 $ (71.19) $5.00 $ 5.00 50.00 30 $ 104.92 50.00 5 134.92 5 (84.92) $5.00 $ 18.73 ($13.73)