4,253 - 425.30 (10% OFF) = ₹3,827.70

3,243.81 + 583.89 (18%) = 3,827.70

• 4 + @ 15% : 3,081.62 + 18% = 3,636.31
• 8 + @ 19% : 2,919.43 + 18% = 3,444.93
• 12 + @ 24% : 2,757.24 + 18% = 3,253.54