An antique dresser was $115 but is on sale for 30%off. If there is 10% tax added to the sale price how much will the dresser cost?
The dresser is on sale for 30% off, so the sale price is 100% - 30% = 70% of the original price.
The sale price is $115 * 70% = $<<115*70*.01=80.5>>80.50.
The tax added to the sale price is $80.50 * 10% = $<<80.50*10*.01=8.05>>8.05.
Thus the total cost of the dresser is $80.50 + $8.05 = $<<80.50+8.05=88.55>>88.55. Answer: \boxed{88.55}.