$ millions	Apr. 30, 2019	Apr. 30, 2018
Sales	$7,838.0
Depreciation expense	206.0
Land	$122.1	$120.1
Buildings and fixtures	903.2	$812.6
Machinery and equipment	2,185.0	$2,111.5
Construction in progress	321.8	$212.1
Gross property, plant, and equipment	3,532.1	3,256.3
Accumulated depreciation	(1,619.7)	(1,527.2)
Total property, plant, and equipment	$1,912.4	$1,729.1

a. Compute PPE turnover for fiscal year ended April 30, 2019.b. Compute the average useful life of depreciable assets at April 30, 2019. Round answer to one decimal place. c. Compute the percentage used up of the PPE at April 30, 2019. Round answer to one decimal place (ex: 0.2345 = 23.5%)