Suppose in the table to the right, workers are paid $10 per hour and there are no other costs.
Total Cost, TC, is just L x 10.
Marginal Cost, MC is the change in cost divided by change in output or 10 ÷ MP.
As an exercise, see if you can fill in the table to the right.
When you're done you can check your answer on the following page.
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| Labor | Q | MP | AP | TC | MC |
| 0 | 0 | - | - | - | - |
| 1 | 3 | - | - | - | - |
| 2 | 9 | - | - | - | - |
| 3 | 16 | - | - | - | - |
| 4 | 23 | - | - | - | - |
| 5 | 29 | - | - | - | - |
| 6 | 34 | - | - | - | - |
| 7 | 38 | - | - | - | - |
| 8 | 41 | - | - | - | - |
| 9 | 43 | - | - | - | - |
| 10 | 44 | - | - | - | - |