Formatting the Y-Axis in a line chart with $

[NickHoff]

I have the following expression:

NUM((SUM({1<Facility =  $::Facility,GroupName = $::GroupName, MarketName = $:: MarketName, DivisionName = $::DivisionName, ProcGroupDesc = $:: ProcGroupDesc, ProcedureSurgeonName=$::ProcedureSurgeonName, CalendarYear = $:: CalendarYear, CalendarMonthYear = $:: CalendarMonthYear, CalendarMonth = $:: CalendarMonth>} SupplyChainTotalCost)/COUNT({1<Facility =  $::Facility,GroupName = $::GroupName, MarketName = $:: MarketName, DivisionName = $::DivisionName, ProcGroupDesc = $:: ProcGroupDesc, ProcedureSurgeonName=$::ProcedureSurgeonName, CalendarYear = $:: CalendarYear, CalendarMonthYear = $:: CalendarMonthYear, CalendarMonth = $:: CalendarMonth>}DISTINCT SurgicalCaseSk))-$(eCostBenchmark),'$#,##0')

Which on the line points displays correctly as a $ amount.  Under the number tab my field is formatted as Money without the .00 such as  $#,##0

However, when viewing the line chart the Y Axis displays the value of the field as an integer.  How can I make my Y Axis display the money format instead of the integer?