Answer:
Money's role as 'medium of exchange' , 'store of value'
Step-by-step explanation:
Money is something which is used as : medium of exchange, measure of value, store of value, standard of deferred payments.
Money used by Raphael to purchase computer : reflects role of money as a 'medium of exchange', as it is used as a purchasing power mode to buy computer. Using money as medium of exchange & to transfer purchasing power, is much convenient than barter system (commodity to commodity exchange)
Bank money left after computer purchase : reflects role of money as a 'store of value'. Money is the most convenient, economical, stable value mode of storing value ; unlike barter goods requiring maintenance, having unstable value. The stored money can be used for future purposes (eg - vacation later).