Answer:
Unearned Service Contracts Revenue = $330,000
Step-by-step explanation:
Unearned Service Contracts Revenue refers to the expected revenue from a contracts been carried and has yet been paid.
Unearned Service Contracts Revenue for 2010 = $100,000, for 2011 = $160,000 and for 2012 = $70,000
Unearned Service Contracts Revenue = $100,000 + $160,000 + $70,000
Unearned Service Contracts Revenue = $330,000