Answer:
$43.99
Step-by-step explanation:
400 copies = 200 copies + 100 copies + 100 copies
Price:
200 copies - $21.50
100 additional copies - $10
100 additional copies - $10
Total = $21.50+$10+$10=$41.50
Sales tax = 6%
Find 6% of $41.50:
[tex]\$41.50\cdot 0.06=\$2.49[/tex]
So, Roger will pay
[tex]\$41.50+\$2.49=\$43.99[/tex]