Show the hours, not just the total
A single line reading '46 hours - ₹1,84,000' prompts questions. Break the hours into the main activities - site visits, analysis, workshops, calls - so the client can match them against what they saw happen, and send your timesheet with the invoice.
Use decimals for part hours (7.5 rather than 7 hours 30 minutes), and invoice on the same day each month so the client's accounts team knows when to expect it.