The following average cost information is available from a local bank that makes loans to local contractors and disperses progress payments to contractors when specific tasks are verified as complete.
24 % Excavation and framing complete
8 % Roof and fireplace complete
3 % Wiring roughed in
6 % Plumbing roughed in
5 % Siding on
17 % Windows, insulation, walks, plaster, and garage complete
9 % Furnace installed
4 % Plumbing fixtures installed
10 % Exterior paint, light fixtures installed, finish hardware installed
6 % Carpet and trim installed
4 % Interior decorating
4 % Floors laid and finished
a.What is the estimated cost for the Tolstoy’s house if they use contractors to complete all of the house?
Estimated total cost for the house is $348,000 (2,900 sq. ft. x $120 per foot).
b.Estimate what the cost of the house would be if the Tolstoys use their talents to do some of the work themselves.
Estimated savings of Serge’s plumbing work and Mrs. Tolstoy’s interior decorating:
Plumbing roughed in 6% x $348,000 = $20,880
Plumbing fixtures installed 4% x $348,000 = $13,920
Interior decorating 4% x $348,000 = $13,920
Total saving = $48,720
Estimated total cost for the completed house using their talents is $299,280 ($348,000 - $48,720).