Please help with solving this question. I am unsure why I can't figure out the equation:

Naylor Company had $155,200of net income in 2016 when the selling price per unit was $154, the variable costs per unit were $94, and the fixed costs were $571,900. Management expects per unit data and total fixed costs to remain the same in 2017. The president of Naylor Company is under pressure from stockholders to increase net income by $62,800in 2017.

A). Compute the number of units sold in 2016.