Dove Ltd operates a factory that contains a large number of machines designed to produce knitted garments. These machines are generally depreciated at 10% p.a. on a straight-line basis. In general, machines are estimated to have a residual value on disposal of 10% of cost. At 1 July 2017, Dove Ltd had a total of 64 machines, and the statement of financial position showed a total cost of $428,000 and accumulated depreciation of $133,000. During 201718, the following transactions occurred:

1.	On 1 September 2017, a new machine was acquired for $15,000. This machine replaced two other machines. One of the two replaced machines was acquired on 1 July 2014 for $8,400. It was traded in on the new machine, with Dove Ltd making a cash payment of $9,000 on the new machine. The second replaced machine had cost $9,200 on 1 April 2015 and was sold for $7,400.
2.	On 1 January 2018, a machine that had cost $4,100 on 1 July 2008 was retired from use and sold for scrap for $510.
3.	On 1 January 2018, a machine that had been acquired on 1 January 2015 for $7,100 was repaired because its motor had been damaged from overheating. The motor was replaced at a cost of $4,900. It was expected that this would increase the life of the machine by an extra 2 years.
4.	On 1 April 2018, Dove Ltd fitted a new form of arm to a machine used for putting special designs onto garments. The arm cost $1,200. The machine had been acquired on 1 April 2015 for $10,200. The arm can be used on a number of other machines when required and has a 15-year life. It will not be sold when any particular machine is retired, but retained for use on other machines.

determine the depreciation expense for Dove Ltd for 2017-18