I think there is a failure to communicate here.

What he questions is the base price of SS.

He ASSUMES that the base price of SS is 45/frag

Yet here, in this event, it is shown to have a base price of 50/frag (thus 40@20% off, 35@30% off etc)

However, as shadoblaze pointed out, his concept of what the base price of SS is only an assumption, and a wrong one--what he assumed to be the base price is actually a DISCOUNTED price that is offered in an EVENT where most, if not every, item are discounted.