Roman Co. manufactures jeans in the cutting and sewing process. Jeans are manufactured in 50-jean batch sizes. The cutting time is 6 minutes per jean. The sewing time is 15 minutes per jean. It takes 5 minutes to move a batch of jeans from cutting to sewing.

I have to figure out the value-added time, non-value-added time, and total lead time. I put that the value-added time was 21 because of the time it takes to sew and cut, but I don't know how to get the other two.