supply and integration of uhf digital device trans receiver walkie talkie for pmrts operation along with comprehensive operation and maintenance for a period of 3 years , cost for supply of uhf digital device trans receiver walkie talkies for pmrts operationalong with comprehensive operationand maintenance for a period of 3 years–without keypad , cost of supply of vehicle mounted digital walkie talkies operating in uhfband along with standard accessory (magnetic mount antenna) along with comprehensive operation and maintenance for a period of 3 years , cost of supply of digital static radio unit with standard accessory (power supplyunit,lmr 400 cable of 30 metre,yagi antenna) along with comprehensive operation and maintenance for a period of 3years , less:buyback amount for existing devices , airtime subscription charges for year 1 , airtime subscription charges for year 2 , airtime subscription charges for year 3 , sub total (excluding gst) , gst @18%