To find out how much Josiah will pay for the CD, we need to add the sales tax to the price of the CD:
Sales tax = 8.25% of $15.99
Sales tax = (8.25/100) x $15.99
Sales tax = $1.32 (rounded to the nearest cent)
So the total cost for Josiah to purchase the CD is:
Total cost = Price of CD + Sales tax
Total cost = $15.99 + $1.32
Total cost = $17.31
Therefore, Josiah will pay $17.31 for the CD.