If sales tax is 7%, what is the total cost of both a new iphone that is $600 and a $50 case?

The cost for the phone and the case is 600 + 50 = $650

Multiply total cost by 7% to get the tax.

The tax would be 650 x 0.07 = $45.50

Add the tax to price of the phone and case to get total:

650 + 45.50 = $695.50