ChefPro makes a line of gas BBQs. Below is their forecast for the first 6 months next year. They are interested in using level strategy to produce their needs. Their current level of full time staffing has them able to produce 700 BBQs per month. Beginning Inventory is 100 units. Inventory holding costs are $35 per unit per month. Backorder costs are $55 per unit per month. Regular labour is $80 per unit. Calculate the cost of this plan. Use formulas for all calculations