1 item, 1 prim vendor script

I wanted to use this script to sell an item.

When one try's to pay the object one gets several choices of payment 1 linden 5 10, ,, or other. I had to type the amount in. Like tip jar

IF this is the way it should work, it's useless for my needs.

Follow the instructions and it does what it's supposed to do. Simple setup. Thank you!

ive set the script up and its not giving me or anyone else the items when we pay the prim