The total box office revenue for the entire saga

100xp

Just like every cbind() has a rbind(), every colSums() has a rowSums(). Your R workspace already contains the all_wars_matrix that you constructed in the previous exercise; type all_wars_matrix to have another look. Let's now calculate the total box office revenue for the entire saga.

Instructions

Calculate the total revenue for the US and the non-US region and assign total_revenue_vector. You can use the colSums() function.
Print out total_revenue_vector to have a look at the results.

Take Hint (-30xp)