Graham started his own landscaping business this year. He is interested in getting the greatest deduction he can on the capital-asset purchases he made this year. He provides you with the following list of purchases:

Item	Date of Purchase/ Contribution	Cost
Graham's personal contribution of riding lawnmower	5/4/xx	$5,878 FMV at contribution $4,200
New zero-turn super mower	4/7/xx	$15,989
Used backhoe	9/23/xx	$26,000
New dump truck	10/8/xx	$45,763
Used garage	11/9/xx	$78,555
New computer	7/19/xx	$3,450
Used Ford Focus	6/6/xx	$12,456 (60% business use)

Additional Information

The taxable income before any depreciation deduction for the year is $158,000.

Task

Using relevant tax laws and regulations, identify and explain the maximum depreciation deduction for Grahams business.