Q4: Realty Ltd. purchased a tract of unimproved land for $55,000. This land was improved and subdivided into building lots at an additional cost of $30,000. These building lots were all of the same size. However, owing to differences in location, the lots were offered for sale at different prices as follows. Group No. of Lots Price per Lot 1 9 3,000 2 4,000 3 2,000 15 19 The number of unsold lots are: Group 1 5 lots Group 2 7 lots Group 3 2 lots Required: Calculate at the net income realized on this operation to date