How my business will be taxable if I do payments to foreing supliers?

I am an On-Line reseller of goods and services all over the world from the US and after I get paid, I get my commission and send the rest to the suppliers or Owners let say through Western Union outside of US. 

 

What is needed to deduct those payments to foreign business even they could be in amounts less than 500 USD?

 

How my business will be taxable? 

 

Any form is required? e.x: 1099-misc, 8300 or W-8Ben??

 

Thanks