Your clumsy accountant spilled coffee on an important document this morning and is having a hard time reading what your firm's costs are. You hope that enough information is still visible that the information in the distorted cells can be recovered. Given the information below, what is the marginal cost of producing the first unit of output? (Just respond with a number, no dollar sign is required)

Quantity	Total Cost	Fixed Cost	Variable Cost	Average Fixed Cost	Average Variable Cost	Average Cost	Marginal Cost
0	44
1			20
2				22
3					20