---
id: 5d792538d169f33142175b95
title: Step 105
challengeType: 0
dashedName: step-105
---
# --description--
To make this function pure, instead of depending on application state implicitly, we can pass it down explicitly as an argument.
Add an argument `cells` to `evalFormula`.
# --hints--
See description above for instructions.
```js
assert(code.replace(/\s/g, '').includes('evalFormula=(x,cells)=>{'));
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```