{
  "$schema": "./question-pack-v2.schema.json",
  "format": "math-drill-question-pack",
  "schemaVersion": 2,
  "kind": "generated_template",
  "id": "example-interview-math-retail-revenue",
  "packVersion": "1.0.0",
  "title": "Example Interview Math Retail Revenue",
  "description": "An original Interview Math template covering equation selection, exact calculation in millions, units, and interpretation.",
  "publisher": "Example Learning Lab",
  "license": "CC BY 4.0",
  "templates": [
    {
      "id": "retail-network-annual-revenue-001",
      "category": "case_math",
      "tags": ["revenue", "multiplication", "unit_conversion"],
      "difficulty": ["beginner", "intermediate"],
      "promptTemplate": "A retailer operates {stores} stores. Each store serves {customersPerStoreDay} customers per day for {operatingDays} days per year, and the average basket is ${averageBasket}. What is annual revenue? Enter the answer in $M.",
      "variables": {
        "stores": {
          "type": "integer",
          "values": [10, 20],
          "unit": "stores"
        },
        "customersPerStoreDay": {
          "type": "integer",
          "values": [200, 400],
          "unit": "customers"
        },
        "operatingDays": {
          "type": "integer",
          "values": [250, 300],
          "unit": "days"
        },
        "averageBasket": {
          "type": "currency",
          "values": [20, 40],
          "unit": "currency"
        }
      },
      "formula": {
        "expression": "stores * customersPerStoreDay * operatingDays * averageBasket / 1000000",
        "outputVariable": "annualRevenueMillions"
      },
      "answerUnit": "m",
      "explanationTemplate": {
        "steps": [
          "Setup: annual revenue equals stores x customers per store per day x operating days x average basket.",
          "Annual transactions are {stores} x {customersPerStoreDay} x {operatingDays}.",
          "Multiply annual transactions by the ${averageBasket} basket and divide by 1,000,000 to convert dollars to millions.",
          "Annual revenue is ${annualRevenueMillions}M, before costs or profit margins."
        ],
        "shortcut": "Group factors into round numbers before multiplying, then convert dollars to millions once at the end."
      },
      "caseStyle": {
        "calculationStepCount": 2,
        "industry": "retail",
        "interviewMath": {
          "expectedUnit": "m",
          "equationOptions": [
            {
              "id": "equation-correct",
              "label": "{stores} x {customersPerStoreDay} x {operatingDays} x ${averageBasket} / 1,000,000",
              "formulaCorrect": true,
              "setupCorrect": true
            },
            {
              "id": "equation-setup-wrong",
              "label": "{stores} x {customersPerStoreDay} x {operatingDays} x ${averageBasket} / 1,000",
              "formulaCorrect": true,
              "setupCorrect": false
            },
            {
              "id": "equation-formula-wrong",
              "label": "({stores} + {customersPerStoreDay}) x {operatingDays} x ${averageBasket} / 1,000,000",
              "formulaCorrect": false,
              "setupCorrect": false
            }
          ],
          "interpretationOptions": [
            {
              "id": "interpretation-correct",
              "label": "This is annual revenue before subtracting operating costs or applying a profit margin.",
              "isCorrect": true
            },
            {
              "id": "interpretation-daily",
              "label": "This is one day of revenue for a single store.",
              "isCorrect": false
            },
            {
              "id": "interpretation-profit",
              "label": "This is annual profit after all operating costs have been deducted.",
              "isCorrect": false
            }
          ]
        }
      }
    }
  ]
}