Service tax query

we are a partnership manufacturing firm payng carriage expenses to the transporter.

suppose, we are paying transportation charges to four transpoters and while paying to the gta, we deduct service tax e.g. Rs. 500/-, Rs. 600/-, Rs. 800/- and Rs. 1150/- respectively as a service receiver. my question is,

how many gar-7 challans should be made online for depositing service tax ? whether four challans for

Rs. 500/-, Rs. 600/-, Rs. 800/- and Rs. 1150/- respectively or one challan for Rs.3,050/- ? please

suggest me immediately as it is most URGENT for me.

regards,

---- Avik Ghosh

9804970973