[tex]\begin{gathered} A\text{.} \\ \text{The simple interest earn,} \\ I=\text{PRt} \\ I=800\times\frac{5.9}{100}\times7 \\ I=330.4\text{ \$} \end{gathered}[/tex][tex]\begin{gathered} B\text{.} \\ \text{Total balance is,} \\ \text{Balance}=\text{ \$800+\$330.4+\$275} \\ \text{Balance}=\text{ \$1405.4} \end{gathered}[/tex]
