GreenWave, a company specializing in electric vehicle $($EV$)$ charging stations, is planning to enter the global market. The global EV charging stations market is estimated to be $$25$ billion annually. For its initial launch, GreenWave has identified Europe as its target market. The Europe market for EV charging stations is estimated to be $$6$ billion annually.

GreenWave has further segmented the European market based on urbanization levels, targeting urban areas $(60$ million households, with an $8\%$ penetration rate$),$ suburban areas $(70$ million households, with a $6\%$ penetration rate$),$ and rural areas $(40$ million households, with a $4\%$ penetration rate$)$ households. The company has set different Average Selling Prices $($ASPs$)$ for its EV charging station at $$300$ for urban, $$250$ for suburban, and $$200$ for rural households.

Based on the above information, how big is the Serviceable Available Market $($SAM$)$ and Serviceable Obtainable Market $($SOM$)$ for GreenWave$$s EV charging station?

A$)$SAM: $$25$ billion, SOM: $$3\mathrm{.}680$ billion

B$)$SAM: $$25$ billion, SOM: $$2\mathrm{.}975$ billion

C$)$SAM: $$6$ billion, SOM: $$2\mathrm{.}810$ billion

D$)$SAM: $$6$ billion, SOM: $$3\mathrm{.}120$ billion