The following data describe four inventory items:

Item i Ki ($) Di (units per day) hi ($)

1 100 10 .1 2 50 20 .2 3 90 5 .2 4 20 10 .1 The company wishes to determine the economic order quantity for each of the four items such that the total number of orders per 365-day year is at most 150. Formulate the problem as a nonlinear program, and find the optimum solution.