<image>A farmer brought some kilograms of self-grown potatoes to the city to sell. For convenience, he brought some small change as backup. He sold some potatoes at the market price and then reduced the price to sell more. The relationship between the kilograms of potatoes sold and the money he had on hand (including the small change) is shown in the figure below. Based on the graph, answer the following questions:  (1) How much small change did the farmer bring? (2) What was the price per kilogram of potatoes before the price reduction? (3) After the price reduction, he sold the remaining potatoes at 0.4 yuan per kilogram, and then he had a total of 26 yuan on hand (including the small change). How many kilograms of potatoes did he bring in total?