Task: Question Answering
Input (English): Problem: a worker is paid a regular rate of rs . 20 for completing a survey . the worker completes 50 surveys per week . for any survey involving the use of her cellphone , she is paid at a rate of that is 10 % higher than her regular rate . if she completed 35 surveys involving the use of her cellphone , how much did she get that week ? 
Options: a ) 570 , b ) 670 , c ) 1070 , d ) 470 , e ) 2070
Output (English): c