NOTE 3 - CONTRACTS IN PROGRESS

Costs and estimated earnings in excess of billings on uncompleted contracts represent accumulated project expenses and fees which have not been invoiced to customers as of the date of the balance sheet. These amounts are stated on the balance sheet as Unbilled Receivables of $587,015 and $690,344 as of October 31, 2010 and 2009, respectively.

Billings in excess of cost and estimated earnings on uncompleted contracts represent project invoices billed to customers that have not been earned as of the date of the balance sheet. These amounts are stated on the balance sheet as Deferred Revenue of $443,853 and $111,463 as of October 31, 2010 and 2009, respectively.

Revenue received for the sale of equipment includes a provision for warranty and is treated as deferred revenue, along with extended warranty sales. These amounts are amortized over the 12-month warranty term starting from the date of sale. These amounts are stated on the balance sheet as Deferred Revenue of $770,330 and $287,018 as of October 31, 2010 and 2009, respectively.