Final answer:
The average inventory level for the auto repair shop's cleaning rags, calculated using a standard inventory management model, will be 80 boxes over time.
Step-by-step explanation:
The question describes a standard inventory model where the auto repair shop orders a fixed quantity of inventory, and this inventory is used up at a constant rate until it reaches zero, at which point a new order arrives to replenish the stock. This scenario represents a simple inventory management problem that aims to calculate the average inventory level over time.
Assuming that the inventory depletes at a constant rate and there are no delays in replenishment, the average inventory level can be calculated as the maximum inventory level divided by two. When the inventory is at its maximum level (160 boxes), it will linearly decrease to zero before replenishment. This forms a triangle if you were to plot the inventory level over time until replenishment. Therefore, the formula for the average inventory level is:
Average Inventory Level = (Maximum Inventory Level) / 2
Average Inventory Level = (160 boxes) / 2
Average Inventory Level = 80 boxes
So, over time, the average inventory level of the cleaning rags will be 80 boxes.