I am stuck on this, can someone try and solve so I can understand please! Thank you so much!'

At January 1, 2013, Gardo Company has beginning inventory of 7,500 deluxe tricycles. Jake estimates it will sell 20,000 units during the first quarter of 2013 with a 15% increase in sales each quarter. Gardo's policy is to maintain an ending inventory equal to 10% of the next quarter's sales. Each tricycle costs $100 and is sold for $260. How many units should Gardo produce during the first quarter of 2013