Question: I need help please I can't figure out why my numbers are off. Q should be 234 not 233 and lost should be 58 not

I need help please I can't figure out why my numbers are off.
Q should be 234 not 233 and lost should be 58 not 56 but I can't figure out what is the problem.
can you please enter the formula for the z score or what is the function used in excel to get the right score. I'm using = NORMSINV (c*) but I'm not getting the correct answer.
thank you.
Decentralized Supply Chain Production Cost $ 35.00 Wholesale Price $ 75.00 Retail Price $ 115.00 Salvage Value $ 25.00 E(D) 250 Std. Dev (D) 125 Cu $ 40.00 Co $ 50.00 * 0.44 Q 233 Z-score L(Z) OAS 3 E(Lost Sales) 56Step by Step Solution
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