{
  "$schema": "./question-pack-v2.schema.json",
  "format": "math-drill-question-pack",
  "schemaVersion": 2,
  "kind": "exhibit",
  "id": "example-delivery-channel-exhibit",
  "packVersion": "1.0",
  "title": "Example Delivery Channel Exhibit",
  "description": "A small original table exhibit for practicing data extraction and addition.",
  "publisher": "Example Learning Lab",
  "license": "CC BY 4.0",
  "datasets": [
    {
      "id": "delivery-channel-orders",
      "title": "Orders by Delivery Channel",
      "description": "A retailer compares completed orders across two delivery channels.",
      "sourceNote": "Synthetic figures created for this example.",
      "unit": "units",
      "columns": [
        {
          "id": "channel",
          "label": "Channel",
          "role": "dimension",
          "valueType": "text"
        },
        {
          "id": "orders",
          "label": "Orders",
          "role": "metric",
          "valueType": "number",
          "unit": "units"
        }
      ],
      "rows": [
        {
          "id": "online",
          "label": "Online",
          "cells": {
            "channel": "Online",
            "orders": 140
          }
        },
        {
          "id": "partner",
          "label": "Partner",
          "cells": {
            "channel": "Partner",
            "orders": 210
          }
        }
      ],
      "visualization": {
        "type": "table",
        "title": "Completed Orders",
        "selectedColumnIds": ["channel", "orders"]
      },
      "questions": [
        {
          "id": "total-orders",
          "responseType": "numeric",
          "difficulty": "beginner",
          "prompt": "How many completed orders are shown in total?",
          "tags": ["addition"],
          "answer": {
            "value": 350,
            "unit": "units",
            "roundingRule": "exact"
          },
          "explanation": {
            "short": "Add the orders from both channels.",
            "steps": ["140 online orders + 210 partner orders = 350 total orders."],
            "shortcut": "Add 14 + 21, then restore the trailing zero."
          },
          "expectedTimeSeconds": 30
        }
      ]
    }
  ]
}