"Worksheet","Compare home printing with a copy shop using the same job","Evidence status","Your configuration"
"Purpose","Compare the full cost of equivalent useful output over a stated period. Include purchase and time assumptions explicitly instead of comparing a supply-only estimate with a shop’s finished price.","Proposed workflow",""
"Check","Question to record","Decision","Your observation"
"Equivalent output","Same stock, sides and finishing","Fair comparison",""
"Fixed cost","New purchase or existing device","Name the decision",""
"Variable cost","Per useful side","Keep inclusions aligned",""
"Example","With invented inputs, a $180 new printer and $0.06 variable home cost compete with a $0.12 shop price. Ignoring other differences, the crossing point is $180 ÷ ($0.12 − $0.06) = 3000 useful sides. If the printer is already owned and not being replaced, that purchase calculation answers a different question.","Illustrative; not a measured product result",""
"Source","https://help.brother-usa.com/app/answers/detail/a_id/186864/~/toner-yield-not-as-expected","Official references; scope in article",""
"Result","Accepted / unresolved / needs correction","Record date and configuration",""