Here's a closer look at these charges:

Account charges

• Tariff type: the amount you pay for the electricity used is based on what tariff type you are on. This bill shows the customer is on an A2 Residential tariff.
• Tariff charges: the number of electricity units used and (tariff rate) cost per unit in this billing period. GST is added as a separate line item. 
• Supply charge: the charge to supply the electricity to your supply address. This is charged on a daily basis, whether you use electricity on that day or not.

Products, credits and adjustments

• Buyback (solar credit): if you have solar installed, this shows a credit for any units of solar electricity that have been fed back to the network as shown in this example. We buy each unit of electricity at a set price. If your buyback scheme has an on-peak and off-peak price, or if you receive your bill between seasons, you will see multiple rates listed here.
• Rebates or subsidies: if you receive any concessions, rebates or subsidies, this will appear here as a credit on your account and shown with a minus sign (-).
• Fees: any fees charged to your account will appear here. Example of fees include paper bill, overdue notice, Australia Post payment and credit card payment.