How to categorize drop-shipping

Hi there,

 

I have a Schedule C sole proprietor business with a web shop. 

 

Let's say I sell a $500 music instrument & receive payment - then another business fulfills the order and I pay them $400. It's drop-shipped - They have inventory, but I never touch the goods.

 

Is it correct for me to:

- Report $500 income

- Deduct $400 expense

 

What category should this expense go in? "Drop-shipped musical instruments"... Something generic like "Other" or "Supplies"?

 

Thanks,

-Daniel