Final answer:
The break-even Probability of Default requires more detailed financial data to calculate. The NPV for granting credit depends on the balance of revenues, costs, and default impact, adjusted by the monthly return. The EOQ formula provides the number of orders needed to minimize inventory costs.
Step-by-step explanation:
The break-even Probability of Default is not directly calculable with the provided information as it would require knowledge of the fixed costs, total potential sales volume, and a detailed default cost structure. Calculating NPV (Net Present Value) of credit sales to a new customer would involve assessing expected revenues against expected costs and the potential loss from defaults, adjusting for the time value of money with the required return rate.
For the EOQ (Economic Order Quantity) calculation, use the formula: EOQ = sqrt((2DS)/H) where D is the annual demand, S is the order cost, and H is the holding cost per unit. Substituting in the given values: EOQ = sqrt((2*100,000*58)/3.5), the EOQ will determine the optimal number of orders to minimize total inventory costs.