function [revenue] = parkingRevenue(timeUsed, price)
%parkingRevenue computes the revenue from parking fees
% timeUsed: a matrix with the number of hours each spot was used
% price: a matrix with the price per hour for each spot
% ONLY THE EDGE VALUES FROM EACH MATRIX SHOULD BE USED
%
% revenue: the total amount earned from all parking spots
% Write your code here!
end