AI agent: expense tracker in Google Sheets and n8n chat

## Save your expenses via chat message. 

LLM will parse your message to structured JSON and save as a new row into Google Sheet.

## Installation
### 1. Set up Google Sheets:
Clone this Sheet:
https://docs.google.com/spreadsheets/d/1D0r3tun7LF7Ypb21CmbTKEtn76WE-kaHvBCM5NdgiPU/edit?gid=0#gid=0

(File -> Make a copy)

Choose this sheet into "Save expense into Google Sheets" node.


### 2. Fix sub-workflow dropdown: 
open "Parse msg and save to Sheets" node (which is an n8n sub-workflow executor tool) and choose the SAME workflow in the dropdown. it will allow n8n to call "Workflow Input Trigger" properly when needed.


### 3. Activate the workflow to make chat work properly.
Sent message to chat, something like "car wash; 59.3 usd; 25 jan 2024"

you should get a response:
Your expense saved, here is the output of save sub-workflow:{"cost":59.3,"descr":"car wash","date":"2024-01-25","msg":"car wash; 59.3 usd; 25 jan 2024"}

and new row in Google sheets should be inserted!