An American retailer buys the winter-coats for $50 each from a regional supplier and sells them for $150 each during the

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An American retailer buys the winter-coats for $50 each from a
regional supplier and sells
them for $150 each during the regular season. The demand for the
winter-coats is forecasted with
normal distribution of 300 on the average and the variability is
expressed with 50 units. Any winter
coat left unsold in the regular winter season, can be sold at a
discount house for $25, but the retailer
must pay for the transportation cost to the discount store with
10 cents per dollar invested originally.
In the case that demand is more than the initial procurement
from the regional supplier, a second
procurement is possible. However, the supplier increases the
price to $70 from the original $50 each.
Find the unit understocking (Cu) and the unit overstocking (Co)
costs for the American retailer.
Show the mathematical algebra in achieving the correct final
result to get credit.