Inventories

9 Months Ended

12 Months Ended

Jan. 31, 2013

Apr. 30, 2012

4.	Inventories:


	January 31, 2013			April 30, 2012
Work-in-progress for maintenance contracts under completed contract accounting	$	4,366		$	3,951
Consumables		111,926			96,588
Provision for obsolescence		(10,518	)		(10,526	)


	$	105,774		$	90,013

11.

Inventories:


	2012			2011

Work-in-progress for long-term maintenance contracts under completed contract accounting	$	3,951		$	5,989
Consumables		96,588			105,713
Provision for obsolescence		(10,526	)		(9,478	)


	$	90,013		$	102,224

Direct costs includes $3.3 million write-down of inventory to the lower of cost or market value for the year ended April 30, 2012 (2011 – $4.8 million).

- Definition

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

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