In which product category (e.g. car shampoo) should I enter this?

Dear Sir/Madam,

I recently started a car detailing company. In the beginning, I purchased a lot of products and machines and entered them as investments, but now I regularly buy new coatings or car shampoos. These are things that are used by the services I offer to my customers, but they run out quickly and need to be reordered.

So I’m wondering which category I should enter these items under, as I can’t imagine having to write them off in a few years’ time when they only last a few weeks.

Thanks in advance!

Kind regards,

Lowie Piro
Blingboost