Staff expected sales in calendar

My old system would show the expected sales amount based on current booked appointments for each staff and how much they already collected... it would should show something like "800,00$ / 1 557,00 $" for the week in the calendar on top of the staff's name.  It allows the staff to know how much the expect to sell and stimulate them to sell more if they think their expected sales are too low.  Would love to have this feature added.