Goodwill Average Profit Questions

The profits for five years of a firm are as follows:Year 2013: $\text{Rs. }4,00,000$ Year 2014: $\text{Rs. }3,98,000$ Year 2015: $\text{Rs. }4,50,000$ Year 2016: $\text{Rs. }4,45,000$ Year 2017: $\text{Rs. }5,00,000$ Calculate the goodwill of the firm on the basis of a 4-year purchase of 5 years average profits: