Dental Supply Cost Calculator

No -- Supply % of Collections is calculated only from Monthly Supply Cost divided by Monthly Collections, and Monthly Lab Cost has no effect on it at all. Laboratory fees get their own separate Lab % of Collections output instead, since dental practices typically track material supply costs and outside lab fees as distinct expense categories with different industry benchmark ranges.

Monthly Collections sits in the denominator of the Supply % of Collections ratio, while Monthly Supply Cost sits in the numerator, and dividing by a changing base is not perfectly symmetric with multiplying by one. A rise in Monthly Collections actually moves the ratio less than an equal-sized rise in Monthly Supply Cost would; it's a matching drop in Monthly Collections that moves the ratio more. Swung up and down together, that asymmetry gives Monthly Collections a marginally wider two-sided spread -- but it is a mechanical property of division, not an indication that collections matter more strategically than supply spending.

Supply % of Collections reports what the practice is actually spending on supplies right now as a share of collections, independent of any goal. Annual Savings Opportunity instead compares that current spending level against the entered Target Supply % and projects the annual dollar difference if spending were brought down to the target, so it depends on the target while the ratio itself does not.

No -- both inputs are used only to compute the per-operatory and per-patient cost breakdowns (Supply Cost per Operatory, Supply Cost per Patient), not the headline Supply % of Collections ratio, which depends solely on Monthly Supply Cost and Monthly Collections regardless of how many operatories or patients that spending is spread across.