
Answer:
$ 18,179
Explanation:
From the list price we will apply the trade discount to know the nominal at the invoice.
Then we will apply the discount agreed on the invoice of 2% getting the net cost of the merchandise:
list price: Â Â Â Â Â Â Â Â Â Â Â Â Â 26,500
trade discount of  30% =  (7,950) Â
invoice nominal         18,550
discount within first 10 days:
18,550 x 2% = Â Â Â Â Â Â Â Â Â Â Â (371)
net of discount: Â Â Â Â Â Â Â Â Â 18,179