D Start by finding the total cost of the items purchased on Monday, then apply the discount to them all at once. Add all 5 items for a total of $14.96. The discount for these items was 25%, so Anya paid 75% of their total cost. 10075​($14.96)=$11.22. Now do the same for Wednesday's items. The total is $10.50. The discount is 30%, so Anya pays 70%, and 10070​($10.50)=$7.35. Add the totals for the two days and apply the tax all at once. $11.22 +$7.35=$18.57. Multiply this by 1006.25​ to get an additional $1.16 in tax (once you round down a bit), so the total bill is $18.57+1.16=$19.73. This matches (D).