will someone help me solve this please? thanks!

Furniture, Inc., estimates the following number of mattress sales for the first four months of 2020 : Finished goods inventory at the end of December is 6,900 units. Target ending finished goods inventory is 20% of the next month's sales. How many mattresses should be produced in the first quarter of 2020? A. 68,280 mattresses B. 93,540 mattresses C. 102,580 mattresses D. 60,020 mattresses