Parasol Systems sells motherboards for personal computers. For quantities up through 25 , the firm charges $350 per board; for quantities between 26 and 50 , it charges $315 for each board purchased beyond 25 ; and it charges $285 each for the additional quantities over 50 . A large communications firm expects to require these motherboards for the next 10 years at a rate of at least 140 per year. Order setup costs are $30 and holding costs are based on an 18 percent annual interest rate. What should be the size of the standing order? Parasol Systems sells motherboards for personal computers. For quantities up through 25 , the firm charges $350 per board; for quantities between 26 and 50 , it charges $315 for each board purchased beyond 25 ; and it charges $285 each for the additional quantities over 50 . A large communications firm expects to require these motherboards for the next 10 years at a rate of at least 140 per year. Order setup costs are $30 and holding costs are based on an 18 percent annual interest rate. What should be the size of the standing order