400
Grayson can catch 8 grapes in his mouth when Brianna throws them to him. Isaiah can catch 12 grapes when Brianna throws them to him. How many grapes in total can Grayson and Isaiah catch? If Ms. Morgan can catch 6 times as many grapes as Grayson and Isaiah, how many grapes can she catch in her mouth?
8 + 12 = 20 grapes ; 20 x 6 = 120 grapes