Julia's service charge at a beauty salon was $72.60, before tax. The sales tax rate was 8%. If she added 20% of the amount before tax as a tip, how much did she pay for the service at the salon?

Service charge for Julia at a beauty salon = $72.60

The rate of sales tax taken = 8%

Percentage of tips she added to the service charge before sales tax = 20%

Then amount of tips given by Julia = (20/100) * 72.60

= (1/5) * 72.60

= 14.52 dollars

Then the amount in total paid by Julia before adding service tax = (72.60 + 14.52) dollars

= 87.12 dollars

Now the sales tax of 8% has to be calculated on the amount of $87.12.

Then

Amount of sales tax given by Julia = (8/100) * 87.12

= 696.96/100

= 6.969

= 6.97 dollars

So the total amount paid by Julia for the service at the salon = (87.12 + 6.97) dollars

= 94.07 dollars

Julia paid a total of $94.07 for the service she received at the salon.