b. What might best explain the change in gross profit % from 2016 to 2017 ? (5 points) 1. Increased production costs 2. Decrease in volume (quantity) of goods sold 3. Increase in selling prices 4. Decreased raw materials costs c. Which is the best explanation for the change in Net Income \$ from 2016 to 2017 ( 5 points) 1. Increase in sales 2. Decrease in production costs 3. Decrease in miscellaneous expense 4. Increase in income tax expense d. Which is the best explanation for the change in operating income \% from 2016 to 2017? (5 points) 1. Increase in sales 2. Decrease in operating expenses 3. Increase in production costs 4. Increase in income tax expense