Scheduling and Sorting Program

I am looking to create a program that can sort and schedule appointments (past and future) by setting criteria for each day (ie, Only include "x" amount of appointments for day "y" ) given a set database which will be sorted appropriately The schedule will have the following properties: - To generate appointment times into schedule based on criterias given(ie, weekends only or certain times of the day) - Hide/Show certain attributes for client (ie show female clients only) - Automatically input appointments according to adjustable criteria to fulfill requirements (ie, The month of May can only have 30 clients or x amount of dollars and program will automatically fill up the appointments for the month of May from the database. - Have adjustable "resting" time for worker in between appointments - Able to Print out Invoice for client " x " - Calender view by date, month, year, and daily hours for several workers. Please contact for more details.