Kito makes on online purchase of a guitar case for $39.99, a tuner for $24.99 and picks for $26.99. Taxes are 6% of the total purchase price. Shipping is $8.20-add up the total: 39.99+ 24.99+ 26.99= 91.97 -calculate the sales tax: 91.97 x 0.06= 5.5182 -add in the sales tax: 5.5182+ 91.97= 97.4882 -add in the shipping cost: 97.4882+ 8.20= 105.6882
And you get $105.69 which is option A. Kito has been billed correctly