Tаissа Mоtоrs mаnufactures a prоduct requiring 0.5 ounces of platinum per unit. The cost of platinum is approximately $400 per ounce; the company maintains an ending platinum inventory equal to 10% of the following month's production usage. The following data were taken from the most recent quarterly production budget: July August September Planned production in units 1,000 1,100 980 The cost of platinum to be purchased to support August production is: