This tab is available if the Provide Main Vacation option is selected. The tab contains a list of accruals that are used as the calculation base for payout for the requested number of main vacation days which the employee will not use as actual vacation.
Note. The data on this tab is for information only; any changes made on the tab will not be used in calculations. 
The "Vacation (create)" form. The Base Accruals tab
The Accrual Type column shows the accruals selected as the base accruals for this vacation type. The Rate column shows the coefficient that defines weight of this accrual in the base for vacation pay calculation. The rate is populated from the master record of the accrual type assigned to this main vacation.
The amount shown in the last row (with grey background) is the sum of base accruals each multiplied by the corresponding rate (coefficient). This total amount is used for calculation of the main vacation payout (compensation).