Inventory a/c

Hallo,

I’ve been trying to answer myself a question, and it’s about the connection, which I don’t see, between theory (F3 book ) and the T a/cs of the example (F3 book) following, my question is only about the Inventory a/c entries, where they differ with theory:

1. Theory

For the opening inventory
Credit the inventory account with the value of the opening inventory
Debit the income statement with the value of the opening inventory.

For the closing inventory
Debit the inventory account with the value of the closing inventory
Credit the income statement with the value of the closing inventory.

2. Example

In Year 2, Bubbles had opening inventory of $10,000. Sales during the year were
$80,000 and purchases were $30,000. Closing inventory at the end of Year 2 was
$12,000. The entries in the main ledger of Bubbles can be summarised as follows:

Inventory account
————————————————————————-
Dr Opening balance b/f 10,000 || Cr Income statement 10,000
Dr Income statement 12,000 || Cr Closing balance c/f 12,000
22,000 || 22,000
Dr Opening balance b/f 12,000 ||

Income statement
——————————————————————–
Dr Opening inventory 10,000 || CR Sales 80,000
Dr Purchases 30,000 || Cr Closing inventory 12,000
Dr Gross profit c/d 52,000 ||
92,000 || 92,000
|| Cr Gross profit b/d 52,000

Why could be that theory Inventory a/c entries do not coincide with the entries in the example?

Thank you!

MP