More about the garbage bags

So I did some calculations.

One bag costs 40 yen. In Marugame there are 300,000 people. At an average of 3 people per household that's 100,000 households. If each household takes out the trash ten times a month (twice a week for burnable, twice a month for non burnable), then they are using ten garbage bags a month. 10 bags x 40 yen/bag x100,000 households equals 40,000,000 yen or a bit less than $400,000 a month in trash bags x 12 months is 4.8 million a year in trash bags. For our family that means 48 dollars a year on trash bags, just for burnable and non burnable garbage. Hmm....