\section{Introduction}

\definition{}
An \textit{asset} is any resource that has economic value.\par
Examples: gold, oil, grain, cash, real estate, treasury bonds, etc

\definition{}
A \textit{stock} is a particular type of asset.
A share of stock represents \say{partial ownership} of a corporation.
Like many assets, stocks are \textit{intangible}---they only exist on paper.

\problem{}
Let $\mathbb{X}$ be a stock, currently priced at $19\Rub$. \par
Bogdan buys 10 shares of $\mathbb{X}$, and sells them after a month for $23\Rub$ per share. \par
What was his net profit?


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