Peterson Papers makes personalized stationery of the highest quality. The company maintains a stock of blank note cards, calling cards, stationery, and envelopes. Customers order online, indicating the product type, personalization (monogram, name), font style, and color. The following schedule is typical of an order of 100 calling cards:
						Activity	Minutes
						Process order	8
						Wait for production to begin	50
						Pull calling cards from inventory	10
	Set up machine for font style and color	4
	Print calling cards	32
	Inspect cards	2
	Wait for packaging	8
	Package cards for shipping	4
	Wait for pickup by FedEx	60

Value-added time in minutes

I only need help calculating the value-added times in minutes. I do not know the formula or how to get the answer.

Thank you.