"By the way, old man, do you burn coal here How much does coal cost, is it expensive",Seeing the old man's hesitation, Yan Laowu decisively drew his knife and said: "Old man, blue bricks are 20,300 per unit, red bricks are 20,800 per unit, a total of 48,000.","Okay!" Old Second readily agreed. "I didn't bring it with me today, I'll come deliver the money tomorrow."。