Concept:A cash discount is calculated on the invoice amount after trade discount has been deducted.Explanation:List price =1560×60=N93,600Trade discount =10% of N93,600=N9,360Invoice amount after trade discount =N93,600−N9,360=N84,240For the 5% cash discount option: cash discount =5% of N84,240=N4,212Answer:D. N4,212