Figuring out the % of the assets sold is nothing a fourth grader cannot do ... just set up a spreadsheet and put that elementary education to good use.
For instance ...
cost basis % of total sales price cost of sale
House 100K 76% 140K 15200
land 20K 16% 40K 3200
AC 10K 8% 20K 1600
total 130K 100% 200K 20K
