On the Your Deductions Page, under Common Business Expenses, it shows $87,987.
When I click on the update button for Common Business Expenses and add the totals from each box, the sum equals $63,403.
If I click on Forms vs. step-by-step, it shows $86,274.
It looks like Automobile and Truck Expense along with Meals & Entertainment are being entered here and again on the Your Deductions Page.
If I subtract those two amounts (Auto & Meals) from the breakdown, it equals what I manually calculated $63,403.
It's still off by $1,713. There are no depreciation expenses and I've already looked at meal allowances (like others have suggested when I queried this question).