Manual Automate Triggered

{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        220,
        80
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "Mock data",
      "type": "n8n-nodes-base.function",
      "position": [
        420,
        80
      ],
      "parameters": {
        "functionCode": "// Code here will run only once, no matter how many input items there are.\n// More info and help: https://docs.n8n.io/nodes/n8n-nodes-base.function\n\n\nreturn [ { json: { amount_USD: 50 } }, { json: { amount_USD: 20 } }, { json: { amount_USD: 60 } } ];"
      },
      "typeVersion": 1
    },
    {
      "name": "Summing function",
      "type": "n8n-nodes-base.function",
      "position": [
        660,
        80
      ],
      "parameters": {
        "functionCode": "// Code here will run only once, no matter how many input items there are.\n// More info and help: https://docs.n8n.io/nodes/n8n-nodes-base.function\n\n//Setup an empty variable to hold the count\nlet total = 0;\n\n//Loop over the incoming items of data\nfor (item of items) {\n  //For each item of data, add the amount_USD to our total counter\n  total += item.json.amount_USD;\n}\n\n//Returns a well formed JSON object with just the total_value . You can either add more data to this returned object OR use the set node afterwards to do it in a no-code way.\nreturn [ { json: { total_value: total } } ];"
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "Mock data": {
      "main": [
        [
          {
            "node": "Summing function",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "On clicking 'execute'": {
      "main": [
        [
          {
            "node": "Mock data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}