Suppose you sign up as a Reseller Gold on the 5th of January. Your billing cycle begins immediately, so your subsequent invoices will fall due on the 5th of February, the 5th of March and so on.
Your first resold account is a "Small Business Starter" which you sign up on the 15th of January. When this account is created, the initial set up fee is added to your invoice, as well as a pro-rata charge for the 21 days of hosting until your next billing cycle.
Around the 29th of January, you will be sent an invoice for the following month. It would contain the following items:
On February the 14th, you sign up a new customer with a "Corporate Giant" account. Again, when this account is created, a setup fee and pro-rata amount are added to your next invoice.
On the 21st, you receive your monthly invoice. It now contains the following items:
On the 25th of February, the owner of your "Small Business Starter" account thanks you for your excellent service, but regretfully tells you that they will be canceling their account, as they wish to follow their life-long dream of becoming a traveling mime. Although the charge for their next month of hosting already appears on the invoice you were issued, as long as you cancel their account on or before the 4th of March, the amount overpaid will be credited on the invoice due on the 5th of April.