We can assume:
X = ROI
Y = Money invested on electronic cigarette
Z = Money invested on regular cigerette
For 30 days of usage regular cigarette, 20 sticks = RM10, the equation as below:
Z = RM10 x 30 = RM300
For 30 days of usage electronic cigarette, one time investment of electronic cigarette kit and consume 1ml e-liquid per day ,. 1 bottle of 10ml e liquid = RM15:
Y = RM180 + (RM15x3) = RM225
From above calculation, we can get the ROI, X :
X = Z - Y = RM75
First month you'll get RM75 of money saving.
Lets calculate the annual saving you'll get from the electronic cigarette;
Similar case, applied to moderate smoker, 20 sticks of regular cigarette per day.
Z = RM10 x 30 x 12 months = RM3600
Y = RM180 + (RM15 x 3 x 12 months) = RM720
X = Z - Y = RM2880
Annually, electronic cigarette user will get RM2880 of money saving !
How many years you've been smoked on the regular cigarette,. 10 years?.. calculate yourself.