12. Maintenance costs at Seaside Manufacturing over the past six months are listed in the following table. Month Maintenance cost Machine hours January $13,600 15,500 February $14,720 16,900 March $13,000 13,000 April $14,480 16,600 May $16,000 18,000 June $13,200 15,000 Using the high-low method, what would the total maintenance costs be if 17,800 machine hours were used? (Round any intermediary calculations to the nearest cent.) A. $5,320 B. $15,880 c. $10,680 D. $28,680