the chem-tex chemical company is considering two additives for improving the dry-weather stability of its low-cost acrylic paint. additive a will have a first cost of $140,000 and an annual operating cost of $60,000. additive b will have a first cost of $185,000 and an annual operating cost of $45,000. if the company uses a 4-year recovery period for paint products and a marr of 15% per year, what is the incremental rate of return and which process should be selected? question 7 options: incremental ror