Swell Company reports the following annual cost data for its single product.

Normal production level 75,000 units

Direct materials $ 1.25 per unit

Direct labor $ 2.50 per unit

Variable overhead $ 3.75 per unit

Fixed overhead $ 300,000 in total

This product is normally sold for $25 per unit. If Swell increases its production to 200,000 units, while sales remain at the current 75,000-unit level, by how much would the company's income increase or decrease under variable costing?