In 2017, an agricultural company introduced a new cropping process which reduced the cost of growing some of its crops. If sales in 2016 and 2017 were steady at $50 million, but the gross margin increased from 4% to 6.6% between those years, by what amount was the cost of sales reduced? Select one: O a. $1,300,000 O b. $660,000 O c. $330,000 O d. $2,600,000