Accounting $-$ Billing has a total cost pool of $$2,000,000.$ The cost driver has been determined to number of procedures. What would the allocation rate be for Accounting$/$Billings$?$

$\backslash$table$[[$Department$,$Revenues,Expenses,Space $($square Feet$),$Number of Procedu$],[$Facilities $($support dept$),,,$$$,1,500,000,10,000,],[$Accounting $-$ Billing $($support dept$),,,$$$,2,000,000,20,000,],[$Total for Support Departments,,,$s,3,500,000,30,000,],[$Routine Care $($patient services$),$$$,30,000,000,$$$,10,000,000,150,000,500,000],[$Intensive Care $($patient services$),$$$,25,000,000,$$$,8,000,000,100,000,450,000],[$Diagnostic Services $($patient services$),$$$,20,000,000,$$$,6,000,000,75,000,375,000],[$Total for Patient Service Departments,$s,75,000,000,s,24,000,000,325,000,1,325,000$