Acafeteria purchases milk from one of three providers each week, depending on what other items need to be purchased. the probability of shopping at each store and the cost of one gallon of milk are shown in the table below.

probability and milk cost by store
store
probability
milk cost per gallon
a
30%
$3.00
b
10%
$3.50
c
60%
$2.75

the cafeteria should budget $ on average for one gallon of milk.