Hello Dadaboina, Kiran,
Thanks for your question.
Price for Azure Spot VMs should be lower than the pay as you go price
A possible reason is the timing of the billing cycle, this can affect the reported costs. https://learn.microsoft.com/en-us/azure/virtual-machines/spot-vms
If the price difference is huge and we can't explain it with timeframes, I will recommend contacting billing support create a support request.
See: https://azure.microsoft.com/en-us/support/plans/
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola