100 - 20.00 (20% OFF) = ₹80.00

67.80 + 12.20 (18%) = 80.00

• 8 + @ 24% : 64.41 + 18% = 76.00
• 16 + @ 28% : 61.02 + 18% = 72.00
• 24 + @ 32% : 57.63 + 18% = 68.00