Populate multiple rows with same variable data using 4 drop-down lists

i creating fill-in invoice bill students classes took.  invoice has 4 rows available bill student multiple classes if took more 1 class.  each class has specified cost associated (for discussion purposes: title1, cost $75.00; title2, cost $100.00; title3, cost $125.00; title4, cost $150.00; title5, cost $175.00; title6, cost $200.00).  able 1 drop-down (one row) populate cost correctly using instructions @ https://acrobatusers.com/tutorials/change_another_field, don't know how add more rows same title/cost variables.

 

example of i'm trying accomplish:  student took 4 of 6 classes, title1, title2, title5, , title6.  invoice should this:

row(cola)       course title(colb)     cost(colc)

1                       title1                           $75.00

2                       title2                         $100.00

3                       title5                         $175.00

4                       title6                         $200.00

 

the 4 drop-down lists (colb) 4 rows have same variable data (course title & cost noted above).  discussion purposes, fields named "1b-title", "2b-title", "3b-title", 4b-title", "1c-cost", "2c-cost", "3c-cost", , "4c-cost".  have been learning javascript on own internet, didn't find similar question.

 

i using acrobat xi pro on windows.

 

thanks assistance.

More discussions in JavaScript

adobe