Mike pays $2.79 for coffee every weekday morning on his way to work. On Saturdays, he goes to visit his mother and takes her out to her favorite coffee shop where he spends $7.83 for two coffees. How much does he spend per week for coffee?
21.78, take and multiply 2.79 by 5 ( there are 5 week days), and add the 7.83 once because it is the price for the two coffees. So weekly he spends roughly 21.78 on coffees