(F) INVENTORIES

Inventories are stated at the lower of average cost (including applicable material, labor, depreciation, and plant overhead) or market, and consist of the following:

	As of
	September 30, 2016		March 31, 2016
	(dollars in thousands)
Raw Materials and Material-in-Progress	$	104,759	$	119,060
Finished Cement		17,096		21,834
Gypsum Wallboard		5,939		5,839
Frac Sand		3,375		5,501
Aggregates		8,387		10,660
Paperboard		3,647		7,575
Repair Parts and Supplies		68,777		68,155
Fuel and Coal		5,602		4,971
	$	217,582	$	243,595

During the three months ended September 30, 2016 we wrote down approximately $7.7 million and $0.8 million of raw materials and materials-in-process and frac sand, respectively. During the three months ended September 30, 2015 we wrote down approximately $9.4 million of raw materials and materials-in-process. These inventories related to our Oil and Gas Proppants segment.