As russellHltn noted, your best source of information for your first quarterly allocation. and even the second quarterly allocation, will be from the stake clerk. Once your ward has been around for at least two quarters you can compute the estimated quarterly allocation. The attendance area amounts are supplied in the Quarterly Budget Allowance reports and Estimated Quarterly Budget Allowance reports you will begin to receive later on.
See
Budget allowance for an explanation. The actual attendance figure amounts are dependent on your area. In the U.S. the attendance figure amounts are: General budget (sacrament meeting attendance) = $12, Young Men = $12.5, Young Women = $12.5, Primary* = $6.25, and Young Single Adults** = $6.25. As explained in the
Budget allowance article the attendance figures come from the quarterly report for the quarter two quarters previous. For example, the first quarter 2013 budget is calculated from the third quarter 2012 report. These allowance amounts are multiplied by the allocation percentage provided by your stake to determine the allocation of the allowance the unit will receive. Contact you stake clerk or stake finance clerk for the the allocation percentages. The allocation percentages will also be on the Quarterly Budget Allowance report once you start receiving it. The formula for each of the five attendance areas is attendance_figure X attendance_figure_amount X allocation_percentage = attendance_area_allocation. Add the five attendance_area_allocation amounts together for the total budget allocation for the quarter.
The sacrament meeting attendance, young men, and young women attendance figures are straight from the quarterly report. *The Primary attendance figure is calculated by multiplying the number of children (ages 8 to 11) from membership records by the percent of Primary attendance from line 21 of the Quarterly Report. **The Young Single Adult attendance figure is calculated by multiplying the number of single adults (ages 18 to 30) from membership records by the percent of sacrament meeting attendance from line 2 of the Quarterly Report.