Question 48 (2 points) ABC Company experienced a shift in the sales mix from products with a low contribution margin ratio in 2018 toward products with a high contribution margin ratio in 2019, although the total amount of sales was the same. Which of the following is most likely? The company had an increase in total variable costs. The company had no change in its net operating income. The company had a decrease in net operating income. The company had an increase in net operating income