Way bill required or not

no as the consignment calue is less than rs 50,000 

whether my sale is outside of West Bengal???

YES , IRRESPECTIVE OF TYPE OF SUPPLY 

No , eway bill has to generate whether , intrastate, or interstate if it is less the 50 k

Only in case

as per rule 138

Provided that where goods are sent by a principal located in one State to a job worker
located in any other State, the e-way bill shall be generated by the principal irrespective of
the value of the consignment:

e way bill applicable when consignment value is (excluding exempt items value) more than 50,000