For ease of performing the next task, move the variable "Social Networks $-$ Facebook, Twitter, etc" to column A on the spreadsheet. $($i$.$e$.$ Make sure it is the first column in the spreadsheet.$)$

The hiring managers recognize that the funding for one employment source depends on the funding for the other sources. Therefore, they want you to perform a multiple regression predicting Social Network funding from Months $1-12,$ while controlling for the funding of Billboard, Careerbuilder, Company Intranet $-$ Partner, and Diversity Job Fair.

Assume that we know the funding for the the controlled variables for Month $13.$ They are:

Billboard: $520$

Careerbuilder: $800$

Company Intranet: $0$

Diversity Job Fair: $1000$

For this model and these known values, what is the predicted value for Social Network funding for Month $13?$