Our family used to run grocery store. GGB (GGP in nepali tongue) quarter was Rs 65-70ish around 2001. 20 yrs ago Full nai aauthyo hola 75 ma. Daily khane manchhe le quarter (175ml) bhanda full (750 ml) kinda faida hunthyo. Also, quarter is not exactly one fourth of 'full', and used to cost more than 1/4th of what full would cost. Simple math. 

Loved to read this!