As manager at Hardbuilt manufacturing, Co., you determined too much metal was wasted to produce one product. This waste significantly increased the cost-of-goods sold. However, you believed training the employees on the proper cutting procedures and use of the machines would reduct the scrap metal cost and increase the profit margin on products sold. Hardbuilt invested $250,000 in a six-day training program for its 60 employees, conducted by the company that build and sell the machines used in the manufacturing company. Six months following the training program, you noticed a significant decline in scrap mental. After careful tabulation you concluded a significant decrease of scrap metal by $1,200,000. What is the ROI? a. 3.8% b. 150% C380% d. 420%