Dear Khyati Pandya
It will not cost you more. Because Flag and rope will be costing only Rs.250 - Rs 300/- Pole you can purchase a pipe of 15' and weld a hook in top and at bottom a grip to tie the rope. (The pipe and welding process and even flag will be one time expenditure and it can be used for coming Aug 15, Oct 2nd and every year).
Sweets may be of high range or even 50 paise toffees.
Anyhow you may be offering tea and biscuits or snacks daily to your employees, add one or two more sweet and pastry with that. Then name it as High tea.
Per head expenditure will be around Rs.50/- for eatables and Flag expenditure will be within Rs.1500/-.
How do you feel it is costly affair. If you collect Rs.100/- from all employees will surely serve the purpose.
If you hesitate for collection, simply chalk out a plan for flag hoisting and get the same approved from your management. In this case no one will deny for this type of expenditure.
With warm regards
S. Bhaskar
9099024667