Lida dealership sells a kind of building materials for a factory (consignment here means that the manufacturer provides the goods for free first and then waits for receipt)

(1) According to the meaning of the question, the price is 240 yuan, and the sales volume in 20 yuan increases by 20 tons, so the sales volume at this time is 40+20=60 tons.

(2) If the selling price is X yuan, the price will be reduced to (260-x).

So the sales volume increased by (260-x) tons, and the quantity sold was x[(260-x)+40].

The monthly profit is (x-100) [40+(260-x)] =10000.

Finishing (x-200)2=0

The result is x=200.

Answer: (1) At this time, the sales volume is 60 tons; (2) The price per ton is 200 yuan.