Deposit section on P&S Agreement......

[Adam M.]

Hey, what's the difference on a P&S agreement in section 4. where it says:

a) By initial deposit submitted herewith receipt of which is hereby acknowledged.

b) By additional deposit due upon sellers acceptance.

Do you only put a deposit on one or the other? if so, how do you know which one? or both? I'm trying to figure out the best way to describe this to a seller. I'm trying to understand this first, lol. I'm a newbie.....thanks for the help!