What would the monthly fixed maintenance cost be?

Maintenance costs at Seaside Manufacturing over the past six months are listed in the following table. Month January February March April Maintenance cost $13,600 $14,720 $12,000 $14,480 $15,000 $13,200 Machine hours 15,500 16,900 13,000 16,600 18,000 15.000 May June Using the high-low method, what would the monthly fixed maintenance cost bo? (Round any intermediary calculations to the nearest cent) O A $3,000 O B. $4,200 OC. $27,000 OD. $10,800