Julia is interested in the consumption of spirits in various regions over the past 10 years. She has information from many countries on the per capita consumption of various spirits (Brandy, Gin, Vodka and Other spirits) from 2001 to 2011. She has population figures fro these countries over the same time period.

Julia is interested in Scandinavia first. Scandinavian countries are considered to be Sweden, Norway, Denmark, Finland, Iceland and Faroe Islands.

The following representative variables and their requisite subscripts where i represents a country and j represents a year. Consider 2001 to be the reference year, that is j = 0 for the year 2001.

B_ij = per capita brandy consumption in country i in the year j

G_ij = per capita gin consumption in country i in the year j

V_ij = per capita vodka consumption in country i in the year j

X_ij = per capita consumption of other spirits in country i in the year j

P_ij = population of country i in the year j

Sj = total consumption of spirits in Scandinavia in the year j

Yj = average consumption of spirits in Scandinavia in the year j

To calculate the average consumption of spirits per person in Scandinavia Julia will need to divide the total consumption of spirits by the total population. Using summation notation, complete with correct subscripts, what is the formula for the average (per capita) consumption of spirits in Scandinavia (for the year j)?