I am unsure how to find the solution for the following question:

Selbie Manufacturers Ltd sells wooden carvings for $322 each. The direct materials cost per unit is $161 and the direct labour is 1.9 hours per unit at a rate of $29 per hour. Manufacturing fixed overhead is applied on the basis of labour hours at a rate of $34 per hour. Selbie makes and sells 1088 units per period. How many units must Selbie sell to breakeven?

Correct Answer:	664 10