As an alternative to totaling your expenses by category in the bank statement Sheet, you can copy and paste data into one of my Tracking Templates (free on my website, just make a copy and save to your own Drive. Easily customizable categories, or I can customize the sheet for you for a fee)
If you plan to do this, drag the columns from your bank sheet into the following order: Date, Transaction, Category, Amount. It is **not necessary** to begin to categorize, but I do recommend sorting by Transaction before copying into the Tracking Template.