Add and edit tables

I need the financials in the proposal converted into a table that follows our style guide. Create a table on page 4 with five columns: Line Item, Q1, Q2, Q3, Total. Paste the figures from the spreadsheet, set column widths so the table fits the page without splitting across pages, apply the company table style, and format the Total column as bold currency. Place a simple title above the table: Project Financials.

Before this goes to procurement, make the table easier to audit. Move the totals column to the far right, add a light row banding every two rows, lock header rows so they repeat if the table spans pages, and insert a small note under the table that lists the exchange rate and rounding rule used. Flag any rows where sums do not match the line entries.

I pasted the quarterly numbers into the proposal table and the Total column sums fail a quick check. Sarah in finance will notice and pause approval; procurement expects precise rounding. I am not sure whether I mis-pasted a column or used the wrong currency format. What immediate steps do I take to find and correct the mismatch, and how do I communicate the issue to Sarah so she trusts the fix?

We repeatedly send proposals with minor table calculation errors that finance flags, which delays approvals and damages trust. What regular habit or simple tool should I adopt to prevent these errors—one that fits our fast turnaround—and how do I enforce it with the team without adding paperwork?