1 Widgetco produces two types of widgets. Each widget is made of steel and aluminum and is assembled with skilled labor. The resources used and the per-unit profit contribution

(ignoring cost of overtime labor purchased) for each type of widget are given in Table 20. Currently, 200 units of steel and 300 units of aluminum and 300 hours of labor are available. Extra overtime labor can be purchased for $10 per hour. Construct an exchange curve between the objectives of maximizing profit and minimizing overtime labor.

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TABLE 20 Resource 1 Type of Widget 2 Steel (lbs) 6 Aluminum (lbs) 8 Skilled labor (hours) 11 Profit contribution (S) 500 1,100 2828 12 20 24