How can i solve this using solver in excel?

Instructions

The Flamingo Grill is an upscale restaurant located in St$.$ Petersburg, Florida. To help plan an advertising campaign for the coming season, Flamingo's management team hired the advertising firm of Haskell & Johnson $($HJ$).$ The management team requested HJ$\text{'}$s recommendation concerning how the advertising budget should be distributed across television, radio, and online. The budget has been set at $$279,000.$

In a meeting with Flamingo's management team, HJ consultants provided the following information about the industry exposure effectiveness rating per ad$,$ their estimate of the number of potential new customers reached per ad$,$ and the cost for each ad:

$\backslash$table$[[$Advertising Media,$\backslash$table$[[$Exposure$],[$Rating per Ad$]],\backslash$table$[[$New Customers$],[$per Ad$]],\backslash$table$[[$Cost$],[$per Ad$]]],[$Television$,90,4000,$$$10,000$