ok some figures for you:
you usually get a nice place for 700BD (house with garden in a compound in budaia with swimming pool + gym etc...)
you rent a small car per month for 120 BD
1 coffee in starbucks: 1,3 BD
usual grocery shopping for two for one week at Geant: 40BD
Shushi for two: 20 BD
normal restaurant per person: around 5 BD
one day at the beach from the ritz carlton: 18 BD for families
i hope it helps, i think you should be fine with this salary, check if you have also housing allowances, education allowances or transport allownaces and/or utility allowances ... and if not ask for it ! it is usual for expats to get these...
cheers