hi guys! the best part is that it is over now!!! it wasn’t too bad i reckon, although last question was a bit bizzare…. however i see few other ppl have arrived at answer similar to mine- cost of Making unit X was 23 and then material A was limiting factor and we can only make 600 of X and the remaining 200 we ought to buy!!! so fingers crossed that would be the right answer… or we are suffering at the same delusion ;P