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Daily demand for a product is 110 units, with a standard deviation of 20 units. The...

Daily demand for a product is 110 units, with a standard deviation of 20 units. The review period is 5 days and the lead time is 6 days. At the time of review there are 50 units in stock.

If 90 percent service probability is desired, how many units should be ordered? (Use Excel's NORMSINV() function to find the correct critical value for the given ?-level. Do not round intermediate calculations. Round "z" value to 2 decimal places and final answer to the nearest whole number.)

  Ordered quantity units
Math   Statistics-And-Probability   
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