So all we have to do is multiply and add :) !
27 multiplied by 1, we'd multiply because it says "1 dollar for each guest" and we know there are 27.
So 27 multiplied by 1 is 27.
And now all we have to do is add. 27 plus 7 would be 34.
So Allen's party cost's $34
I hope this helps :)
