How may units shiukd the company budget to produce in July, August, and September?

A company is creating its production budget. The company's sales budget indicates that it expects sales of 100,000 units in July; 120,000 units in August; 130,000 units in September; and 115,000 units in October. The production manager wants to have an inventory on hand at the end of each month that is 40% of the next month's expected sales. June's ending inventory is expected to be 40,000 units. How many units should the company budget to produce in July, August, and September?