How do I create a Select Case type Calculated Field

i have 2 variables need use both formfields.

 

course credit hours - text field  - variables 4.0, 3.0, 2.0, etc

course grade - dropdown field - values are: a, a-, b+, b, b-, etc

 

i need create result in third field calculation of like:

 

select case (grade)

     case "a"

          4*hours

     case "a-"

          3.7*hours

     case "b+"

          3.3*hours

     case "b"

          3*hours

.....

 

is possible? in advance!

you can use custom calculation script of third text field:

 

var hours = number(this.getfield("course credit hours").value);

var grade = this.getfield("course grade").value;

 

if (grade=="a") event.value = hours * 4;

else if (grade=="a-") event.value = hours * 3.7;

// etc.

else event.value = "";

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