how much!

had the engine out for a paint job.i found a slight oil leak around the head to barrel so i thought head off simple to do.only £24.00($40.00) for a head gasket set.cheaper than a jap set.anyway i broke an oil ring on the piston putting it back together.i thought no problem, i was wrong? i had a four month wait and the cost for the rings for one piston only£94.00($180.00) !!!!!!SHIT!!!!!