parenthesis
exponent
multiply or divide
add
subtract

100

(9-8)+2

3

100

12/14-3/14

9/14

200

4-1-(6-5)

2

200

4-9

-5

300

(5+4-3)+6

12

300

(7+9)*3

48

400

If Bob wants to know much it cost a phone case if the phone case cost $ 1.23 and a 50% discount

0.615

400

45+8

53

500

(12-8)*3

12