Rehan was playing a game of Burger shop. He scored points for each burger he sell. Rehan
scored 140 points for selling his first burger. He scored 160 points for selling his second burger, 180
for selling his third burger, and so on .
(i) Find the number of points Rehan scored for selling his 20th burger.
(ii) Find the total number of points Rehan scored for selling his 20 burgers