800 - 160.00 (20% OFF) = ₹640.00

542.37 + 97.63 (18%) = 640.00

• 4 + @ 24% : 515.25 + 18% = 608.00
• 8 + @ 28% : 488.14 + 18% = 576.00
• 12 + @ 32% : 461.02 + 18% = 544.00