Quantity Unit Selling Price Unit Variable Cost Fixed Costs 310 $52 $31 $1,800 The production manager has indicated that unit variable costs will be increasing by 10%. In an effort to protect profits, the sales manager suggested increasing the selling price by 10% as well. However, an analyst thinks a 10% increase in price will result in a 5% decrease in sales volume. If all these things occur, how much will operating income change?