Marginal Product (MP) is just the increase in Q each time another worker is added.
Average Product (AP) is just Q ÷ L.
Total Cost (TC), is just L x 10.
Marginal Cost (MC) is the change in cost divided by change in output or 10 ÷ MP.
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| Labor | Q | MP | AP | TC | MC |
| 0 | 0 | 0 | 0.0 | 0 | 0 |
| 1 | 3 | 3 | 3.0 | 10 | 3.33 |
| 2 | 9 | 6 | 4.5 | 20 | 1.67 |
| 3 | 16 | 7 | 5.3 | 30 | 1.43 |
| 4 | 23 | 7 | 5.8 | 40 | 1.43 |
| 5 | 29 | 6 | 5.8 | 50 | 1.67 |
| 6 | 34 | 5 | 5.7 | 60 | 2 |
| 7 | 38 | 4 | 5.4 | 70 | 2.5 |
| 8 | 41 | 3 | 5.1 | 80 | 3.33 |
| 9 | 43 | 2 | 4.8 | 90 | 5 |
| 10 | 44 | 1 | 4.4 | 100 | 10 |