I know the answers, I need exact steps for each questions.

1. In 2009 Voest Incs income under absorption costing was $15,000 higher than its income under variable costing. During the year, the company produced 20,000 units. If total variable production costs were $80,000 and fixed manufacturing overhead was $40,000, how many units did the company sell in 2009?

2.Blake Company produces a single product. Last year, Blake's net operating income under absorption costing was 3600 lower than under variable costing. The company sold 10,000 units during the years, and its variable costs were $9 per unit which included $1 variable selling expense. if production cost was $11 per unit under aborption costing, then how many units did the company produce during the years?