a popcorn is $7.00 and a drink is $3.50 tax is 7%. how much will I pay?

a popcorn is $7.00 and a drink is $3.50 tax is 7%. how much will I pay?

Calculate pre-tax amount:
Pre-tax amount = Popcorn price + drink price
Pre-tax amount = 7 + 3.50
Pre-tax amount = $10.50

Calculate post-tax amount:
Post-tax amount = Pre-tax amount * (1 + tax percent/100)
Post-tax amount = $10.50* (1 + 7/100)
Post-tax amount = $10.50 * 1.07
Post-tax amount = $11.24