Put the current budget balance beside a purchase request for review.
Show remaining budget beside your team's purchase requests.
Your finance reviewer can see the current budget balance beside a purchase request, without hunting through a separate sheet.
Show current budget balances on purchases awaiting your approval.
Your pending purchase requests show revised balances beside the amount requested, giving finance reviewers the latest sheet figure as they decide.
Show the current balance before approving your team's purchases.
Your reviewers can see a current budget balance beside pending purchases before deciding, with a fresh note when the figure changes.