The table shows the demand schedule for a particular product.

Quantity Price
0 16
1 14
2 12
3 10
4 8
5 6
6 4
7 2
8 0

Suppose the market for this product is served by two firms that have formed a cartel. If the marginal cost of production is $4 and the fixed cost is $6, the combined profit of the cartel will be _______.