Consider the case where a supplier adds products to stock (i.e., increases the quantity), and
simultaneously, a customer buys the same product (i.e. decreases the quantity). \\
Here, $Q$ represents the quantity (in stock) of Product 1. $B_{2}$ represents the balance of the customer in
$T_{2}$, while $O_{2}$ represents their order.

\begin{center}
    \begin{adjustbox}{width=\textwidth}
        \begin{tabularx}{\textwidth}{|X|X|}
        \hline
        \multirow{2}{*}{\textbf{Transaction-1 ($T_{1}$)}} & \multirow{2}{*}{\textbf{Transaction-2 ($T_{2}$)}} \\
        & \\ \hline
        \textsc{Read($Q$)} & \textsc{Read($Q$)} \\
        \textsc{$Q := Q + q_{1}$} & \textsc{$Q := Q - q_{2}$} \\
        \textsc{Write($Q$)} & \textsc{Write($Q$)} \\
        \textsc{Commit} & \textsc{Read($B_{2}$)} \\
        & \textsc{Write($B_{2}'$)} \\
        & \textsc{Write(Order $O_{2}$)} \\
        & \textsc{Commit} \\
        \hline
        \end{tabularx}
    \end{adjustbox}
\end{center}
\vspace*{5pt}