The variation in retail price and GeM Price of a product could be due to under mentioned factors.
1. The price offering on GeM are inclusive of all taxes.
2. Product on GeM may have a different warranty period.
3. Onsite warranty is offered for some products on GeM.
4. Prices could also vary due to Payment Terms of the transaction.
It is the duration after which Invoice needs to be generated by the Service Provider. In general, the Billing interval is defined as 30 days for majority of services. Invoice generation is pro-rata basis as per the Contract order. Once the Invoice is generated, the buyer may generate Bill and go ahead with payments.