Question: A mixing praces for laboratory-grade sodium phospbate has an estimated first cost of $320000 with annual costs of $4000. income is expected to be $98.000 per year. At a MARR of 20% per year, the payback period is closest to? Include cash flow diagram. The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.