How is SSL paid?

Hi,

I've read the discussion here:

http://community.discountasp.net/showthread.php?t=9343&highlight=ssl+yearly

But I don't understand the explanation:

"You would need the SSL add-on, and that is $10 a month. The total for your plan length (annual or quarterly) is charged. So it's $30 or $120. That is prorated if you order at any time during your term."

Questions:

1. Does this mean:
a) I'll pay $10 every month
b) I'll pay $10 (multiplied by number of months) every time I pay for my account - as in $30 will be added to my bill if I pay every 3 months

2. Can I cancel the SSL addon at any time? How will I be billed?

3. Can I pay for a full year, regardless of how my account is billed normally? This is because someone else is taking care of the payments, and they would like to pay for a full year - for the SSL. This extends to the next question:

4. Can I change the payment.. so if I have 3 months left on my account, can I renew it now together with the SSL, so that I'll have paid for a full year with discountASP + SSL? How do I do this?

Thanks

James