acme inc produces specialized instrument for specific use. the production rate is 7,482 units per day. annual demand for the instrument is 55,731 units per year. the setup cost the production run is $3,059, and the variable cost is $4.49 per unit. acme inc interest rate is 20.25% per year. assume that there are 269 working days per year. what is the optimal size of the production run for this specialized instrument?