Which category for this purchase please?

Hi, its my first topic so go a little easy on me please.

I purchased a sat nav to help me find customers houses, will this just go under General Purchases, or does it belong to something different please.

Wasn’t sure as its not directly used in relation to my services like a tool for a specific job kind of thing.

#Also what would be the difference for the categories “Cost of Sales” & “General Purchases” as the description on the information help box states;

If this relates to something you are reselling or using to carry out your service, use the category ‘General Purchase’.

Thank you for any advice.

If it is not material amount then motor expense will do