A retired couple supplement their income by making fruit pies, which they sell to a local grocery store. During the mont

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A retired couple supplement their income by making fruit pies,which they sell to a local grocery store. During the month ofSeptember, they produce apple and grape pies. The apple pies aresold for $4.50 to the grocer, and the grape pies are sold for$3.60. The couple is able to sell all of the pies they produceowing to their high quality. They use fresh ingredients. Flour andsugar are purchased once each month. For the month of September,they have 1,800 cups of sugar and 2,700 cups of flour. Each applepie requires 1½ cups of sugar and 3 cups of flour, and each grapepie requires 2 cups of sugar and 3 cups of flour.a. Determine the number of grape and thenumber of apple pies that will maximize revenues if the coupleworking together can make an apple pie in 6 minutes and agrape pie in 3 minutes. They plan to work no more than 60hours. (Round your answers to nearest wholenumber.)
b. Determine the amounts of sugar, flour, andtime that will be unused. (Leave no cells blank - becertain to enter "0" wherever required. Round your intermediatecalculations and final answers to the nearest whole number.)