A firm that adapts itself to delivering the desired satisfaction more effectively than its competitors is said to be practicing?

What was the the amount paid by Ojo?

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...

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