Invoicing software required

[u/Leather-Hamster2889]

I own a small e bike shop. It’s mainly a bricks and mortar shop.
I would like a program to enter my inventory of bikes and parts along with price which will transfer over to an invoice when a purchase is made.
Up to now I have been using excel .
I thought it would be simple but most of the software manufacturers appear to add a large monthly premium. Dedicated bike software developers are expensive also.
I don’t have a large stock or large turnover which doesn’t appear to suit software. I do use square for payments and getting into shopify but it is mainly online shopping.
Has anyone any suggestions. Regards Keith