Sales dataset (one row per product/segment/country/month). The schema deliberately does NOT mirror the columns. Produce: (1) datasetTotals — totalProfit and totalUnitsSold are column sums over every row, rowCount is the data-row count. (2) governmentSegmentRows — ONLY rows whose Segment is exactly Government; for each, rename to the schema fields, compute grossMarginPct as (Sales - COGS)/Sales*100 rounded to one decimal, compute totalManufacturingCost as Manufacturing Price times Units Sold, and leave priceEffectiveDate null (the Date column is the transaction date, not a price-effective date). (3) mostProfitableProduct — the Product of the single highest-Profit row.
