Form: how to convert text grades to numbers

[estella_fontys]

I am working on an assessment form in Acrobat, using the Form tool. 10 learning outcomes will be assessed with Unsatisfactory, Satisfactory, Good and Excellent. I use combo boxes to select the USG or E per learning outcome. Each learning outcome is worth 10% of the overall result. If I could convert satisfactory to 1, good to 2 and excellent to 3, I could calculate/automate the overall end result (being USG or E). E.g. 10 to 14 points is Satisfactory, 15-24 points is Good. How can I do this? I am using some javascript already in the form, to populate text boxes, based on combobox selections, but I am new to it. 

[Nesa Nurani]

In dropdown field, give USG or E export value to be score you want, for example under dropdown field properties, 'options' tab where you set choices there is an export value so input 1 for Satisfactory, input 2 for Good ...etc then you can easily calculate score.

[estella_fontys]

Thank you, that is really helpful. I applied it and do have now a text box with the number in (like 12 or 25). How can I convert this into Satisfactory or Good instead of showing the number? 

[try67]

You can use something like this:

if (event.value<12) event.value = "Fail";

else if (event.value>=12 && event.value<=25) event.value = "Satisfactory";

else if (event.value>25 && event.value<=50) event.value = "Good";

etc.

[estella_fontys]

That works, thanks!