$4\%.$

$($Type whole numbers.$)$

$\backslash$table$[[,$A$,$B$,$C$,$D$,E,F,$G$,H,$I$],[1,,$Collection $\%,\%,,,,,,],[2,,$Variable Cost $\%,\%,,,,,,],[3,,$Discount Rate,$\%,,,,,,],[4,,,,,,,,,],[5,$Growth Rates,$\%,\%,,,\%,,,],[6,,$Patients Served,Average Billing,$\backslash$table$[[$Collected$],[$Amount$]],\backslash$table$[[$Variable$],[$Costs$]],$Fixed Costs,$\backslash$table$[[$Total$],[$Collected$]],$Total Costs,Total Profit$],[7,$Year $1,,$$$,$grad,$v,$$$,$grad,grad,grad