Cyber Systems completed the following transactions involving delivery trucks: 1999 Jan. 1 Paid cash for a new delivery truck $41,160. The truck was estimated to have a 5 year service life and a $6,000 residue value. Dec. 31 Recorded straight-line amortization on the truck. 2000 Dec. 31 Recorded straight-line amortization on the truck. However, due to new information obtained earlier in the year, the original estimated service life of the truck was changed from 5 years to 4 years, and the original estimated trade-in value was increased to $7,100. Round your answer to the nearest whole dollar. 2001 July 2 cyber System made decision on Truck Disposal. The above truck was sold for cash $30,000. Required: Please prepare journal entries to record all of the above transactions and DATE the entries and show me your calculations!!! Don't forget to record the amortization on the original truck from January 1, 2001 to the date of sale