total cost were 78500 when 28000 units were produced and 97800 when 36000 units were produced. use the high-low method to find the estimate total cost for the production level of 32000 units. b.susan is trying to decide whether/ not to attend college during the next 12 week session. she has the following options A. attend college full time at the cost of 1200 B. attend college part time at a cost of 600 and work part time earning 1700 C. work full time earning 4700. what is susans incremental profit if she chooses options 3 over 2?