The percentage of value of shipments that come from materials for the average manufacturer is: A greater than or equal to 40 and less than or equal to 49 percent B. greater than or equal to 50 and less than or equal to 59 percent. c. greater than or equal to 60 and less than or equal to 69 percent. D. greater than or equal to 70 percent. Moving to another question will save this response. Moving to another question will save this response.