Before we build any visuals, set up the foundational measures we will use across the whole dashboard. I need a dedicated measures table with these:

- Claim Count — total number of claims - Total Charged — sum of total_charge - Total Paid — sum of total_paid - Net Collection Rate — Total Paid divided by Total Charged - Average Days in AR — average of days_in_ar - Denial Rate — share of claims where current_status = "denied"

Format each appropriately: counts as whole numbers, dollars as currency, percentages and rates with one decimal.