Shelley Company produces a machine that requires three pistons. They feel that they must produce 200,000 machines next year. They want to hold, in their ending materials inventory. enough pistons to meet 10% of next year's production requirement. They will start the year with enough pistons to manufacture 10.000 machines. How many pistons muat they purchase 600,000 630,000 650.000 O 145,000 615,000