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Inventories (Tables) | 3 Months Ended
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Oct. 31, 2013
Schedule of Major Classifications of Inventories | Major classifications of inventories are:
|  | October 31, 2013 |  |  | July 31, 2013 |
Raw materials |  | $ | 106,416 |  |  | $ | 99,154 |
Chassis |  |  | 34,192 |  |  |  | 34,108 |
Work in process |  |  | 41,046 |  |  |  | 36,188 |
Finished goods |  |  | 41,875 |  |  |  | 9,888 |
Total |  |  | 223,529 |  |  |  | 179,338 |
Excess of FIFO costs over LIFO costs |  |  | (26,302) |  |  |  | (26,302) |
Total inventories |  | $ | 197,227 |  |  | $ | 153,036 |

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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