Bcompany switched from the sum-of-the-years-digits depreciation method to straight-line depreciation in
2011. the change affects machinery purchased at the beginning of 2009 at a cost of $72,000. the machinery
has an estimated life of five years and an estimated residual value of $3,600. what is b's 2011 depreciation
expense?
a. $9,120
b. $13,680
c. $15,840
d. $19,200

 B's  depreciation is $ 9120

Explanation:

Given data:

Year  Depreciation base remaining   Life      Depr. fraction   Depr. Exp

2009  68400 ( 72000 - 3600)          5 yr       5/15             (5/15*68400) =           22,800

2010     68400                                     4 yr       4/15              (4/15 *68400) =18,240

where 15 is sum of (5+4+3+2+1)

Total depreciation at the end of 2010 is (22800 + 18240 = 41040)

New overhead value is (68400 - 41040 = 27360)

B's  depreciation is 27360/3 = $ 9120

answer; /// i believe the correct answer is (all of the above);

a. money supply  

have a good day