Appendix: Completing an End$-$of$-$Period Spreadsheet Alert Security Services Co$.$ offers security services to business clients. Complete the following end$-$of$-$period spreadsheet for Alert Security Services Co$.$: If an amount box does not require an entry, leave it blank. Alert Security Services Co$.$ End$-$of$-$Period Spreadsheet $($Work Sheet$)$ For the Year Ended October $31,20$Y$7$