A firm has two products, J and K. Product J has a sales price of $7 and a variable cost per unit of $5. Product K has a sales price of $18 and a variable cost per unit of $12. The firm expects to sell these two products in a mix of 3 units of Product J to 2 units of Product K. If the firm has $100,000 in fixed costs, how many units of Product J need to be produced and sold to earn $900,000 in profit