What proportion of baskets are over $$10$ in sales value? What proportion of baskets are over $$20$ in sales

value?

Hint: You need to use group$\_$by$()$ and summarize$().$ Depending on your approach you may or may not

use mutate$().$

# test your ability to right this code from scratch rather than just

# filling in the blanks :$)$

$\_\_\_\_\_\_\_$

Exercise $4$

Which stores had the largest total sales$\_$value $($hint: sum$($sales$\_$value, na$.$rm $=$ TRUE$)?$ Which stores

had the largest average loyalty discount as defined below?

Hint: You can calculate loyalty discount as a percentage of regular price using the following logic:

$3$