Import Items - Fields explained

Import Items - Fields explained

Completely newby into Zoho Books so apologies in advance if this has already been asked or even solved!!

I am trying to import new items into Zoho Books. These items would (ideally) just be imported as Purchase Items - I buy these items from my providers. I have downloaded the sample csv file but I then found that there are more fields on the importing feature that shown on the sample file. Could you explain what these are? Specifically:

- Item Type

Also, if I just sell clothes what am I supposed to enter on the Usage Unit field?

Thank you,

Santiago