114. "By mixing available fuel, you need to produce 3500 gallons of gasoline for your fleet of trucks this month. You plan to mix 800 gallons of fuel A (80 octane), 1500 gallons of fuel B (92 octane) and 1200 gallons of fuel C (78 octane).

Use the weighted average approach to compute the octane rating for the resulting mix."

"71. Parr-Carsonproduces a steelalloy product. Each pound of alloy is a mix of three elements: 8 ounces of carbon, 6 ounces of chromium, and 2 ounces of nickel. Raw material cost is as follows: carbon, $2.50 per pound; chromium, $5 per pound; and nickel, $12 per pound.

Use a weighted average approach to determine the raw material cost per pound of alloy produced."