The average monthly expenditure of a family for the first four months is Rs. 2750, for the next three months is Rs. 2940 and for the last five months Rs. 3130. If the family saves Rs. 5330 during the whole year, find the average monthly income of the family during the year.
ARs. 3800
BRs. 3500
CRs. 3400
DRs. 4200