List each cost once
For stock loss, measure pints discarded and multiply by the purchase cost per pint. For labour, multiply staff involved by hours spent and the hourly cost to the business. Add chemical and other supplies actually consumed. Keep one-off equipment or installation charges separate from recurring monthly charges.
A pint's selling price is not the cost of the stock. It can show a possible revenue opportunity if the beer is sold, but it is not automatically realised and should never be added to the same pint's avoided stock cost in one savings total.
Annualise carefully
Divide 365 by the number of days between scheduled cleans to estimate a year's cleaning sessions. Record extra cleans separately if they are common in your operation. The calculator compares the current schedule with an illustrative 28-day schedule and shows the components independently.
A new system's rental, powder, service, deposit or installation costs may change the net result. Use a written quote and check which items are included. The lowest apparent cleaning cost is not a substitute for product quality and the supplier's hygiene instructions.
Use your venue's figures
Compare cleaning waste, staff time and supplies. Add DING's written costs before reading a net estimate.
Sources and review
Use actual venue costs and a current supplier quote.