840 - 168.00 (20% OFF) = ₹672.00

569.49 + 102.51 (18%) = 672.00

• 4 + @ 24% : 541.02 + 18% = 638.40
• 8 + @ 28% : 512.54 + 18% = 604.80
• 12 + @ 32% : 484.07 + 18% = 571.20