Automating Excel with LAMBDA and VBA: A Month-End Reconciliation

<p>Imogen Hale, finance manager at Saltmarsh Studio, spends two days every month ticking the bank statement against the cash book with a pencil. The auditors arrive in three weeks and want a reconciliation they can re-run. Across five lessons you build it with her in your own generated workbook, in the Excel lab in your browser (the VBA macro needs desktop Excel): LAMBDA functions that read a reference in any format and sign every amount the bank's way, one-to-one matching that cannot pair the wrong cheque, a reconciliation statement that ties out to exactly zero, and a VBA macro that builds the auditors' report in one click. In every lesson you then hand the same job to your own AI and learn to catch what it gets wrong: the sign flips, the amount-only matches, the duplicate that vanishes. The capstone: your agent closes September while you verify it.</p>

Tools: LET and LAMBDA, Dynamic arrays and XLOOKUP, COUNTIFS matching, Bank reconciliation, VBA macros, Conditional formatting, AI-assisted Excel