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  1. mo-yusuf-da.github.io mo-yusuf-da.github.io Public

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  2. accounts-payable-register accounts-payable-register Public

    Excel accounts payable register for 28 fictional invoices with expense coding, tax recalculation, and approval tracking. 6 control checks caught all 8 seeded errors; aging report shows $60.6K overd…

  3. simulated-rfp-evaluation simulated-rfp-evaluation Public

    Simulated RFP evaluation in Excel: criteria, pricing template, 5-year TCO, weighted scoring, and sensitivity analysis for three fictional suppliers.

  4. supplier-spend-analysis supplier-spend-analysis Public

    Power BI spend analysis of Government of Canada contracts over $10,000 (Alberta vendors): spend by vendor and category, concentration (HHI), and contracts nearing end dates.

  5. time-entry-billing-validation time-entry-billing-validation Public

    Excel workbook validating 328 time entries and 315 billing lines for 30 fictional employees using SUMIFS, COUNTIFS, and INDEX/MATCH. Logged 33 discrepancies with dollar impact and owner; caught 36 …

  6. wip-revenue-recognition-tracker wip-revenue-recognition-tracker Public

    Excel tracker for 5 fictional time-and-materials and fixed-price contracts. Calculates un-invoiced work ($41.5K), amounts billed in excess ($8.4K), and receivables ($101.4K), with 3 self-checks rec…