Question

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

quantity	description	unit price	extension total
2.	2 gro.	napkins, cotton	$12.60 gro.
3.	8 doz.	cherry pitters	$14.04 doz.
4.	9	food processors (3 qt.)	$106.12 ea.
5.	59 pr.	stainless tongs	$68.12 pr.
6.			invoice total
		shipping and insurance	$88.80
7.			total amount due

quantity	description	unit price	extension total
2.	2 gro.	napkins, cotton	$12.60 gro.	$\square$
3.	8 doz.	cherry pitters	$14.04 doz.	$\square$
4.	9	food processors (3 qt.)	$106.12 ea.	$\square$
5.	59 pr.	stainless tongs	$68.12 pr.	$\square$
6.			invoice total	$\square$
		shipping and insurance	$88.80
7.			total amount due	$\square$

Explanation:

Step1: Calculate extension total for item 1

Extension total = Quantity × Unit Price = \(7\times37.80\)
\(7\times37.80 = 264.60\)

Step2: Calculate extension total for item 2

Extension total = Quantity × Unit Price = \(2\times12.60\)
\(2\times12.60 = 25.20\)

Step3: Calculate extension total for item 3

Extension total = Quantity × Unit Price = \(8\times14.04\)
\(8\times14.04 = 112.32\)

Step4: Calculate extension total for item 4

Extension total = Quantity × Unit Price = \(9\times106.12\)
\(9\times106.12 = 955.08\)

Step5: Calculate extension total for item 5

Extension total = Quantity × Unit Price = \(59\times68.12\)
\(59\times68.12 = 4019.08\)

Step6: Calculate invoice total (sum of extension totals)

Invoice total = \(264.60 + 25.20 + 112.32 + 955.08 + 4019.08\)
\(264.60+25.20 = 289.80\); \(289.80+112.32 = 402.12\); \(402.12+955.08 = 1357.20\); \(1357.20+4019.08 = 5376.28\)

Step7: Calculate total amount due (invoice total + shipping)

Total amount due = \(5376.28 + 88.80\)
\(5376.28+88.80 = 5465.08\)

Answer:

1. Extension Total: $\$264.60$
2. Extension Total: $\$25.20$
3. Extension Total: $\$112.32$
4. Extension Total: $\$955.08$
5. Extension Total: $\$4019.08$
6. Invoice Total: $\$5376.28$
7. Total Amount Due: $\$5465.08$