bus travel from mazatlan mexico to detroit michigan?

i am in need of info on a bus trip and i am having trouble getting the info i want to leave sept 28 and arrive in michigan on oct 3 i need roundtrip prices any help would be greatly appreciated thanks in advance

First I suggest to take bus to Tijuana and cross the U.S. border from there, go to San Diego and book a bus to Detroit

check on greyhound.com and click on the Mexican flag. It is possible to book buses from many Mexican cities to U.S. cities