Snookers lumber can convert logs into either lumber or plywood.....?

Snookers Lumber can convert logs into either lumber or plywood. In a given day, the mill turns out three times as many units of plywood s lumber. It makes a profit of $25 on a unit of lumber and $40 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $10710?