Hello sir, i am just going through the kaplan study text and i just need clarification on warranty costs this is what was included in the trial bal Warranty provision 90,000 The year end provision for warranty claims has been estimated at $75,000. Warranty costs are charged to administrative expenses. Administration ((20% × 30) + 170 – 15) this is the calculation. my question is why are they subtracting 15kisnt provision an exp ? by subtracting it they are treating as an income ?