Snow, Snow, Go Away. Come Again Another Day!

This is the day after Christmas. It snowed about 11 inches on top of about 4 inches. My sister and I shoveled snow from her drive and walks, and also two of her neighbors (who were both visiting in California for the holidays). All in all we shoveled three walks, three different times. Calculate this: three walks, 40 feet in length, one walk 10 feet wide and two walks 10 feet wide for the first 20 feet and then 20 feet wide the next 20 feet. Each square foot of snow weighed 1o pounds. One day the snow was 11 inches deep and then two days of 4 inches deep.