Answer:
5.63%
Step-by-step explanation:
Missing word "have to be in order for the system to pay for itself in five years or less?"
Total cost = Installation cost + Holding cost
Total cost = 12500 + (2000*5)
Total cost = $22,500
Sales * Saving rate * Number of years = Total cost
80,000 * S * 5 = $22,500
S = $22,500/$400,000
S = 0.05625
S = 5.63%
Thus, it is required for the company to have 5.62% of saving rate per year to pay for the system.