Question

compute the extension totals and the invoice total for the following invoice.

8.
9.
10.
11.
12.
13.
14.

8.
9.
10.
11.
12.
13.
14.

Explanation:

Step1: Calculate extension total for item 8

Extension total = Quantity × Unit Price = \( 32 \times 2.25 \)
\( 32 \times 2.25 = 72 \)

Step2: Calculate extension total for item 9

Extension total = Quantity × Unit Price = \( 8 \times 4.75 \)
\( 8 \times 4.75 = 38 \)

Step3: Calculate extension total for item 10

Extension total = Quantity × Unit Price = \( 7 \times 10.80 \)
\( 7 \times 10.80 = 75.6 \)

Step4: Calculate extension total for item 11

Extension total = Quantity × Unit Price = \( 4 \times 14.20 \)
\( 4 \times 14.20 = 56.8 \)

Step5: Calculate extension total for item 12

Extension total = Quantity × Unit Price = \( 14 \times 16.50 \)
\( 14 \times 16.50 = 231 \)

Step6: Calculate invoice total

Invoice total = Sum of extension totals of items 8 - 12 = \( 72 + 38 + 75.6 + 56.8 + 231 \)
\( 72 + 38 = 110 \); \( 110 + 75.6 = 185.6 \); \( 185.6 + 56.8 = 242.4 \); \( 242.4 + 231 = 473.4 \)

Step7: Calculate total amount due

Total amount due = Invoice total + Shipping and Insurance = \( 473.4 + 127.30 \)
\( 473.4 + 127.30 = 600.7 \)

Answer:

• Item 8 Extension Total: $\$72$
• Item 9 Extension Total: $\$38$
• Item 10 Extension Total: $\$75.6$
• Item 11 Extension Total: $\$56.8$
• Item 12 Extension Total: $\$231$
• Invoice Total: $\$473.4$
• Total Amount Due: $\$600.7$