---
id: 5d7925394089b762f93ffa52
title: Part 124
challengeType: 0
---
## Description
Now use the shorthand syntax to reference `sum` inside of `spreadsheetFunctions`.
This both adds it to the functions you can use in the spreadsheet, and allows you to use it throughout your program.
## Instructions
## Tests
```yml
tests:
- text: See description above for instructions.
testString: assert(/[{,]sum[,}]/.test(code.replace(/\s/g, "")));
```
## Challenge Seed
```html
```
### Before Test
### After Test
```html
```
## Solution