Machinery costing $21.000 with an estlmated salvage value of $1,800 and an estimated life of 5 years was purchased on 0 ctobes 31,201 Using the staight tine depreciaticn meth od, what a the amount of depretiation expense to be recorded at December 3t, 20.1?? Mitiple Groice $320 $640 14600