Google Sheets that run the operation, not just record it.

System Architecture

Designed a matrix Google Sheet that records each expense with unequal splits and live currency conversions. Built a Google Apps Script module that computes net balances for all participants and solves the minimum cash flow problem to settle debts in the fewest possible peer-to-peer transfers.

Apps Script Implementation

function settleBalances() {
  const sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Ledger");
  const netBalances = calculateNetDeltas(sheet.getDataRange().getValues());
  // Greedy min-cash-flow algorithm in Apps Script
  const transfers = minimizeCashFlow(netBalances);
  renderSettlementSummary(transfers);
}

System Architecture

Created an asynchronous queue runner inside Google Sheets utilizing Time-Driven Apps Script Triggers. It fetches each target domain via UrlFetchApp, parses mandatory legal compliance tags, detects dead HTTP links, and summarizes accessibility scores.

Queue Runner Logic

function processBatchAuditQueue() {
  const pendingQueue = getPendingSchools();
  for (const school of pendingQueue) {
    const report = inspectSchoolUrl(school.url);
    recordAuditResult(school.id, report);
    if (isExecutionTimeExpiring()) break;
  }
}

System Architecture

Architected a high-performance multi-tier Google Sheet. Tier 1 handles raw data caching from GOOGLEFINANCE and public APIs. Tier 2 normalizes metrics (P/E, EV/EBITDA, ROE) into memory arrays to avoid workbook recalculation lag. Tier 3 renders the interactive cockpit with dynamic sparklines.

Formulas & Data Pipeline

=MAP(Tickers, LAMBDA(t, 
  LET(price, GOOGLEFINANCE(t, "price"),
      eps,   INDEX(IncomeData, MATCH(t, Tickers, 0), 4),
      IF(eps > 0, price / eps, "N/A"))
))