My google sheet formula isn't working as intended.

In order to calculate the ROI of an event im making I use different stats and make a big calculation of points at the ROI collumn [![Presentation of the collumn blank][1]][1]

The formula I'm currently using: =G9 + (H9 * 2) + (I9 * 2) + (J9 * -4) + (K9 / 15) + (L9 * 0.5)

But the ROI cases stay in Error and tell me there is an error in the formula and doesn't give any detail.

I've already checked every entrance and they are correct [![error][2]][2]

Can someone help me solved this ? [1]: https://i.sstatic.net/JtuIwN2C.png [2]: https://i.sstatic.net/QsXuptJn.png

My Google sheet formula isn't working as intended.

In order to calculate the ROI of an event I'm making I use different stats and make a big calculation of points in the ROI column

The formula I'm currently using: =G9 + (H9 * 2) + (I9 * 2) + (J9 * -4) + (K9 / 15) + (L9 * 0.5)

But the ROI cases stay in Error and tell me there is an error in the formula and doesn't give any detail.

I've already checked every entrance and they are correct

Can someone help me solved this ?