The Higgins Company sold the Northwest Company some machinery parts. The net price was $10,000, and the terms were 3 / 10 , n / 60. The items were shipped FOB shipping point and the shipping charges were $100. The date of the invoice was July 10. If the invoice is to be paid on July 19 , find the net amount due.

Question

The Higgins Company sold the Northwest Company some machinery parts.  The net price was $10,000, and the terms were 3 / 10 , n / 60. The items were shipped FOB shipping point and the shipping charges were $100. The date of the invoice was July 10. If the invoice is to be paid on July 19 , find the net amount due. 
(a)  $ 9,900.00 (b)  $ 9,600.00       (c)  $ 9,800.00 (d)  $ 9,700.00       (e)  $ 10,000.00

I cant figure out the concept in order to figure out the solution can someone please help me out just to give me the concept or the formula to figure out the answer