Let’s reconsider Example 1 with the following changes. Suppose as many as 4,600 units of raw material are available, but they must be purchased at a cost of $4 per unit. Also, as many as 5,000 hours of labor are available, but they must be purchased at a cost of $6 per hour. The per-unit sales price of each product is as follows: product 1—$30; product 2—$42; product 3—$53; product 4—$72. A total of 950 units must be produced, of which at least 400 must be product 4. Determine the maximum amount that the firm should be willing to pay for an extra unit of raw material and an extra hour of labor.