Answer:The original price of the calculator was P1,500.Step-by-step explanation:A 25% discount means Sarah paid 75% of the original price (100% - 25% = 75%).Let "x" represent the original price of the calculator.We know 75% of the original price (0.75x) is equal to the discounted price (P1,125).This can be written as: 0.75x = P1,125Divide both sides by 0.75:x = P1,125 / 0.75x = P1,500