Dear Tutor - would you please help me with the below question and explain how you derive o the numbers? I am just not getting the answers I should and I dont know what I am doing wrong.

Thanks so much in advance!

Myers Inc. undertook the following transactions relating to their coal inventory in the month of January.

Date 01.01

Transaction - Beginning Balance

Quantity (kg) - 100

Unit Price (eur/kg) - 5

Date 05.01.

Transaction - Purchase

Quantity (kg) - 50

Unit Price (eur/kg) - 7

Date 09.01

Transaction - Purchase

Quantity (kg) - 40

Unit Price (eur/kg) - 8

Date 15.01

Transaction - Sale

Quantity (kg) - 110

Unit Price (eur/kg) - 20

Date 16.01

Transaction - Purchase

Quantity (kg) - 30

Unit Price (eur/kg) - 10

Date 20.01

Transaction - Sale

Quantity (kg) - 50

Unit Price (eur/kg) - 22

1. Please calculate the COGS for the period under the permanent LIFO method.
2. Please calculate the COGS for the period under the permanent weighted average method.