For quantities of product that a company sells from 0-25, they charges $350 per product; for quantities between 26-50, they charge $315 and beyond 50; they charge $285. A large firm expects to require this product for the next 10 years at a rate of at least 140 per year. Fixed ordering cost is $30 and holding costs are based on 18-percent annual interest rate. What should be the size of the order?