You need to calculate the sale tax and add it to the value of the pair
of pants. The tax is calculated by multiplying the cost of the pants
times the rate, i.e.tax = $55 * 10% = $55 * 10/100 = $ 55*0.1 = $ 5.5.
Now sum this tax to the cost of the pants: $ 55 + $5.5 = $ 60.5. Then,
the answer is $ 60.50
