Initially you would add back the county sales tax of 0.0725 which amounts to an additional $19.93 totaling at this point $294.93, then deduct the .15 sale, which is a deduction of $44.24 ending with a price of the item being $250.69.
Well, there are those medications on TV on ads, where they ALWAYS have these "side-effects", and the MAJORITY of them include heart-pain.
I hope I helped! :-)