This document provides the step-by-step work to calculate goodwill using the weighted average profit method based on information provided about a firm's profits over the last four years. The summary calculations are as follows: 1) The adjusted profits for each of the last four years are calculated by making adjustments for capital expenditures charged to revenue, depreciation, over/undervaluation of stocks, and management costs. 2) A weighted average profit of Rs. 40,000 is calculated based on the adjusted profits and assigned weights for each year. 3) Applying the weighted average profit of Rs. 40,000 to the given three years purchase calculation yields a calculated goodwill value of Rs. 1,20,