Does anyone have a link to a template that would help me?

Small Retail store, and the main things I am after are being being able to keep my stock with sub catgeories.

Ie 80 jackets in 1 syle, 4 colours of 20 each and in various sizes. Have about 6 styles of jackets in total in various colours.

I want to be able to simple add new stock without having to deal with adding fresh formulas each time. Every new month I currently have to link every item of stock in my inventory page to that new month. A PAIN!!!

Some kind of dashboard to see sales results is also required.

No need for tax, invoicing or customer details required.

Any help appreciated. My current system is far too basic