150 - 30.00 (20% OFF) = ₹120.00

101.69 + 18.31 (18%) = 120.00

• 8 + @ 20% : 101.69 + 18% = 120.00
• 16 + @ 24% : 96.61 + 18% = 114.00
• 24 + @ 32% : 86.44 + 18% = 102.00