How do I read my invoice?

For an example invoice open this pdf  (327KB) file.  The layout is as follows:
Top Left: Name and contact details
Top Right: Invoice number and the type of invoice - i.e. an Invoice, Credit Note or Facility Charge
Main Invoice: Sales, rental and VAT charges

Sales Heading - Under this heading you will see the following:

• Advice Note, stating the date and branch of supply and the delivery number
• Purchase Number and/or the name of the person placing the orderYour Location Account number and address for where the items were delivered
• List of products purchased
• Fixed charge - either a delivery charge or a transaction charge if the cylinder is collected at a retail outlet
• Total Charge for Sales

Rental Heading - Under this heading you will see the following:

• Your account number and address for where the cylinders are held
• Type of gas, cylinder size and number of cylinders rented
• Charge/Months
• Total Charge for Rental

Bottom left: Overall total