Please help me find the unit value for A,B,C.

A manufacturer produces three products, A, B, and C. The profits for each unit of A, B, and C sold are $1, $2, and $3, respectively. Fixed costs are $19,000 per year, and the costs of producing each unit of A, B, and C are $4, $5, and $7, respectively. Next year, a total of 9000 units of all three products is to be produced and sold, and a total profit of $19,000 is to be realized. If total cost is to be $69,000, how many units of each of the products should be produced next year? units of product A, units of product B, and units of product C should be produced