please help , thank you

Q.2.3 As part of their Black Friday Special, Jabu's Kota Caf reduced their prices by 10% to (3) R18. What was the price of the Kotas before the decrease? (4) Q.2.4 David wants to save his R5 000 for his graduation party after finishing his one-year qualification. If he gets 9.8% interest per annum, how much interest will he earn on his initial investment over a period of one year? Q.2.5 After saving R3 500 at 6% interest rate, John has R5 000 as his bank balance. For how long did he save his money for? (5) (3) Q.2.6 In a recent world tournament, the South African netball team had the highest number of turnovers converted - they converted 503 turnovers out of 1 200. Calculate the percentage of turnovers achieved by the South African National Team. Q.2.7 A businessman noticed that people visiting his shop increased from 8 200 to 9 500 (3) per week. Calculate the percentage increase in his customers. Q.2.8 The advertised price of a new computer is R3 980 excluding VAT. Calculate the total price of the computer if VAT is added. (VAT = 15%) (3)