Some schools offer the ability to take single classes by paying on a per credit hour basis. The reported price per credit hour and estimated cost for one class at Purdue University Calumet Campus are as follows. Per credit costs are for reference only as many schools will not allow students to pay by credit hour.he cost is $12,891 and 68% cheaper than the average Indiana tuition of $18,985 for 4 year colleges. Tuition ranks 2nd in Indiana amongst 4 year colleges for affordability and is the 71st most expensive 4 year college in the state.