Answer: $765.99
Step-by-step explanation: Cost $705.99. The first thing I'd do is figure out what 1% of that is. Easy. Just divide by 100. I get $7.0599.
Then I would multiply that by 8.5 = 60.009.
Now I add the 8.5% to the original amount to get the total. I get $765.999. Rounding gives me $765.99.