Answer :
For every 5 sandwiches purchased,she got 3 free
For 619 she would get 619 x3 / 5 =1857 /5 = 371 free
She ordered 619 -371 = 284
she paid for 284 sandwiches
For 619 she would get 619 x3 / 5 =1857 /5 = 371 free
She ordered 619 -371 = 284
she paid for 284 sandwiches