<image> With the improvement of people's living standards, household cars are increasingly entering families. Xiao Ming's family bought a car, and he recorded the distance traveled each day for 7 consecutive days (as shown in the table). Based on a standard of 50 km, distances more than 50 km are marked as "+", less than 50 km as "-", and exactly 50 km as "0".

(1) Using the statistical knowledge you have learned, estimate how many kilometers Xiao Ming's family car will travel in a month (based on 30 days).
(2) If 8 liters of gasoline are needed for every 100 km driven, and the cost of gasoline is 4.74 yuan per liter, calculate the gasoline cost for Xiao Ming's family for a year (based on 12 months).