Database Software

Hi, this is my first post and I am in comparison to most of you here, a rookie to Apple computers.

Basically I run a shop that has just changed it's inventory system for newspapers, meaning that in order to maintain a proper accounts and billing system I am going to need a new database and therefore software to make it.

I aren't looking for anything particularly special but the facilities I need are as follows:

-Searchable database
-Shows an account clearly
-Has a variable stock display option (allows different products to be assigned to the account)
-Bill display (this would need to adapt on its own, daily, but be able to be freely adjustable as customers often part pay off their accounts)
-A payment history displaying several of the previous payments and their dates, amounts, ect)

I have done some research and it seems that Bento is a popular choice, I am wondering if anyone has any experience with that in in that case? Would it meet the above criteria?

Thanks, looking forward to here from an informed set of individuals!

-Harry.