Its Simple, because we don’t add Shipping to Product prices. Let me give an Example –
Let’s say if you buy a product Mobile wall charging stand at Rs 60 & USB cable at Rs 50 from our website. The Shipping Charges will be Rs 50 (shipping charges are calculated based on product weight). Now the Total amount you will pay to us is Rs 60+50+50 = Rs 160 (since your total product weight is 500gms the shipping charges will be Rs 50) .
Let me compare another website which offers free Shipping but they add shipping charges to product prices. So if you buy same product from this website the Price for Mobile wall charging stand will be Rs 110 & USB cable at Rs 100 (they added Rs 50 shipping to each of the product prices to offer free shipping). Now the Total you will End up paying will be Rs 210 with Free Shipping :).