1) When Mr. lee left Company A to work in Company B, his salary increased by 20%. However, he later moved from Company B to Company C, and his salary decreased by 20%. Mr. Lee's monthly salary at Company C was $6240 how much did he earn at Company A per month?
2) Mr. Wong had a total of $70 .The younger brother had $2 more than 1/3 of the elder brother's money. How much did the younger brother have?