we are given
Account balance on 1 st August was $1,025
so,
![BB=1025](https://img.qammunity.org/2019/formulas/mathematics/high-school/1lijssmk1upsl60dou5ja7xfh8kb8myyvs.png)
During August, supplies of $3,110 were purchased
so,
purchase =3110
$1,324 of supplies were on hand as of August 31
so, EB=1324
Let's assume supplies expense for August as X
so, we can use formula
![BB+purchase-X=EB](https://img.qammunity.org/2019/formulas/mathematics/high-school/hubccjfxh4o89jsj02i3nkpgxsbqswkmha.png)
now, we can plug values
we get
![1025+3110-X=1324](https://img.qammunity.org/2019/formulas/mathematics/high-school/n7e4wjqrsnhjoqfi2rj3d5rg8zvyxq82gt.png)
now, we can solve for X
we get
![X=2811](https://img.qammunity.org/2019/formulas/mathematics/high-school/aah8kwea50vlixlcmpxz626ikhre0e2a62.png)
so,
The supplies expense for August is $2811.........Answer