Look at the account book. Find Hamdan's balance on 17 August 2022.

Mathematical sentence: 

\(\text{RM}\space1\,020\space+\space\text{RM}\space280\space-\space\text{RM}\space400=\underline{\text{RM}\quad\quad\quad\quad}\)

\(\begin{array} {rr} \small{\color{red}{1}}\;\;\;\;\;\;\;\;\;\;\;\;\;\ \\\space\space\text{RM }\space1\,\space0\space2\space0\space.\space0\space0 \\+\quad\quad\text{RM }\space\space\space\space\space2\space8\space0\space.\space0\space0 \\\hline\space\space\text{RM }\space1\,\space3\space0\space0\space.\space0\space0\\\hline \end{array}\)   \(\begin{array} {rr} \small{\color{red}{0}}\; \small{\color{red}{13}}\;\;\;\;\;\;\;\;\;\;\;\;\ \\\space\space\text{RM }\space\cancel{1}\space\cancel{3}\space0\space0\space.\space0\space0 \\-\quad\quad\text{RM }\space\space\space\space\space4\space0\space0\space.\space0\space0 \\\hline\space\space\text{RM }\space\;\;\space\space9\space0\space0\space.\space0\space0\\\hline \end{array}\)