Using the Economic Production Lot Size Model, please answer the following:

Company B:

A manufacturer of laptop computers operates a plant with an annual capacity of 6,630,000 laptop units.  One of its models is expected to sell 390,000 units in  the coming year.  How large should each product lot be if it costs $575 to change production from one model to another.  Assume that the manufacturer values each laptop unit at $280 dollars and it has a holding interest rate of 2%.  you should round your answer up to the nearest laptop unit.