500 - 100.00 (20% OFF) = ₹400.00

338.98 + 61.02 (18%) = 400.00

• 20 + @ 24% : 322.03 + 18% = 380.00
• 40 + @ 28% : 305.08 + 18% = 360.00
• 60 + @ 32% : 288.14 + 18% = 340.00