Trejo Manufacturing makes a variety of household appliances at a single manufacturing facility. The expected demand for one of these appliances during the next 4 months is shown in the following table along with the expected production costs and the expected capacity for producing these items.

	Month
	1	2	3	4
Demand	415	585	315	545
Production Cost	$49.00	$45.00	$46.00	$47.00
Production Capacity	495	515	455	555

Trejo estimates that it costs $1.50 per month for each unit of this appliance carried in inventory at the end of each month. Currently, Trejo has 120 units in inventory on hand for this product. To maintain a level workforce, the company wants to produce at least 400 units per month. They also want to maintain a safety stock of at least 50 units per month. Trejo wants to determine how many of each appliance to manufacture during each of the next 4 months to meet the expected demand at the lowest possible total cost. (Let P_i = number of units to produce in month i and I_i = inventory held at the end of month i.)

Create a spreadsheet model for this problem and solve it using Solver. What is the optimal solution?

How much money (in dollars) could Trejo save if the company were willing to drop the restriction about producing at least 400 units per month