Bubby Darling Ltd sells two products, A's and Y's. For the coming year, Bubby predicts sales of 5,000 units of A's and 15,000 units of Y's. The contribution margins per unit of products A and Y are $6 and $4, respectively. Bubby's fixed costs are $ $45,000. Assuming that the sales mix is not expected to change, how many units of A's will be sold at breakeven