Fuel Economy of a 50cc Scooter

I filled the tank on Wednesday my payday and the km's were 2842.6km. The following Wednesday the km's read 2947.8km for a total of 105.2km traveled. I filled the tank to the same place and had used a total of 2.89 litres. This equals 36.4 km/L or 103 mpg least i think my maths sucks. Really I dont know my maths sucks.The Scooter is a Honda NVS50 or Honda Today.