Walton Company measured its quality costs for the past two years and summarized those costs using the four categories shown below:

	Last Year	This Year
Prevention costs	$ 321,300	$ 591,500
Appraisal costs	$ 405,000	$ 528,700
Internal failure costs	$ 758,400	$ 450,000
External failure costs	$ 1,177,000	$ 734,400

4-a. Calculate the change in total cost of quality over the two-year period.

Prevention and appraisal activities	393,300 (wrong)	increased
internal and external failure costs	751,000(right)	decreased
total cost of quality	357,100(right)	decreased

Please help with Prevention and appraisal activities