The Fairmount has outsourced the cleaning of its rooms. The contractor charges a daily fixed room cleaning costs of $5,400. Additionally, it charges a variable cost for room cleaning of $25.20 per room. How much revenue would the contractor earn if they cleaned 157 rooms last Saturday? O a $3,956.40 O b. $5,400.00 OC $9,356.40 O d. $8,4327.50