Challenge 4: Sales (Medium)

Problem definition

	US Sales	UK Sales	Egypt Sales
The Beatles	10k	20k	5k
Black Sabbath	3k	15k	3k

Given a new dataset that maps bands to how much sales they’ve made in different markets, you are required to do the following tasks:

1. Clean the dataset sales values in each cell to remove the k suffix, and replace it with the value in thousands (example: 1k --> 1000).
2. Return the maximum sales amount that each market had from any band.