Daily demand for a product is 85 units with a standard deviation of 11 units. The review period is 9 days, and lead time is 4 days. At the time of review, there are 115 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.)

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