The following table shows the relationship between output and number of workers in the short run. If the wage is $50/day, find marginal cost of production

Number of Workers Output
0 0
1 50
2 110
3 300
4 450
5 590
6 665
7 700
8 725
9 740
10 735

Number
of Workers Output MPL MC (=w/MPL)
0 0 -- --
1 50 50 1.00
2 110 60 0.91
3 300 190 0.26
4 450 150 0.33
5 590 140 0.36
6 665 75 0.67
7 700 35 1.43
8 725 25 2.00
9 740 15 3.33
10 735 -5 --