The total CD is Ax tons (200-x) tons, B tons (240-x) tons (60+x) tons and 300 tons, so the answers are: (200-x) tons, (240-x) tons and (60+x) tons.

(2) From the meaning of the question, you can get

x≥0200？ x≥0240？ x≥060+x≥0，

Solution: 0 ≤ x ≤ 200.

yA=20x+25(200-x)=-5x+5000，

yB = 15(240-x)+ 18(60+x)= 3x+4680。

(3) let the total cost be w.

W=yA+？ yB=(-5x+5000)+(？ 3x+4680)

W=-2x+9680

∫k =-2 < 0，

∴W decreases with the increase of X.

∴ When x=200, the freight is the least, and W is the minimum = 9280.

Answer: A village transports 200 tons to cold storage C, A village transports 0 tons to cold storage D, B village transports 40 tons to cold storage C, and B village transports 260 tons to cold storage D, with a minimum freight of 9680 yuan.