Another approach (Alternative C) was to defer recognition of some proportion of the revenue until the warranty period expired. The proportion of the revenue to be recognized immediately would depend on the proportion of the costs associated with the product versus the proportion associated with the service contract. In this example $1,840 - $1,885 =97.6 percent of the revenue(or $2,128) would be recognized immediately, with a cost of goods sold of $1,840, and a margin of 13.5 percent; similarly, $45 - $1,885 = 2.4 percent of the revenue ($52) would be deferred and recognized over the three year life of the service contract, with an associated cost of $15 per year and a margin of 13.5 percent.