Goods that are manufactured or acquired by the seller after the contract of sale are?

Use the information below to answer question 7 and 8.

Ojo purchased the following items from Sani at the specified prices on credit:
200 cartons of milk at N1,000 per carton; 50 bags of rice at N3 000 per bag.
Sani allowed 10% trade discount and 5% cash discount, if payment is made within the agreed period. Ojo paid within the agrred period.

What was the the amount paid by Ojo?

How much was the trade discount?

The basic functin of the Nigeria Ports Authority is to?

The concept that refers to the sale, transfer or exchange of goods and service is?