On this tab, you can specify the sales amounts for the fixed assets sold to the customer. 
The "Fixed Asset Sales (create)" form. The Fixed Assets tab
Click Add on the toolbar to append a line to the document.
In the Fixed Asset column, select the fixed asset being sold to the customer company. The Initial Cost column is populated with
The Gross Cost (Acct. Curr.) subcolumn shows the initial cost of the fixed asset specified on accepting the asset to depreciation.
The Accumulated Depreciation column is populated with the depreciation amount accumulated on behalf of the fixed asset and the Net Book Value column shows the difference between the initial cost and accumulated depreciation for the asset.
The Depreciation for the Current Month column shows the depreciation amount calculated for the current month. Click the Calculate button to calculate the current-month depreciation expense and deduct it from the net book value.
Use the Amount column to enter the sales amount in the accounting asset as in the Fixed Asset Entry document or its revised cost as in the Changes of Fixed Asset Parameters document if the cost was changed.
The Salvage Value (Acct. Curr.) subcolumn shows the asset net book value at which the sale takes place.
The Depreciable Cost (Acct. Curr.) subcolumn is populated by default with the gross cost minus salvage value of the asset. The Accumulated Depreciation subcolumn shows the sum of depreciation amounts calculated over previous periods, since the start of depreciation.
The Net Book Value (Acct. Curr.) column shows the current cost of the fixed asset, that is, the gross cost minus the accumulated depreciation amount.
Use the Amount column to enter the sales amount in the document currency.
The VAT (%) / VAT Amount subcolumns show respectively the percent of the applied tax and the tax amount (in the accounting currency) calculated according to the VAT settings shown on the Main tab.
The Total column is populated with the total sales amount in the document currency.
In the Department column, you can specify the department associated with this fixed asset.
In the Expense Item column, you can select an expense item associated with this sale or fixed asset.
Use the Business Activity column to select the business activity with which this fixed asset is associated.
The GL Accounts column shows the default GL accounts to be used for the fixed asset depreciation.
In the Transaction Content column, provide a brief comment description for the fixed asset being soldjournal entries to be generated for this document.
The tab toolbar buttons
The Calculate Amount button is can be used if you need to calculate depreciation for the current month and deduct this amount from the net book valueto refill the data for the listed fixed assets if the data was changed by other documents.