Calculating A Value In Character Sheet

Working on a new character sheet.  I am trying to set a value using a checkbox as a switch, but I can't get it to work. Here is the relevant code with the checkbox and input box. <span class="sheet-table-data-skills"><input type='checkbox' name='attr_isprofskill' value='0' /></span> <span class="sheet-table-data-skills"><input type="text" name="attr_animalhandling1catbonus" title="animalhandling1catbonus (Professional Bonus)" value="@{isprofskill}*{@{animalhandling1ranks},{30}}kh1}" disabled="true"></span> Specifically the part I would like to calculate out is  value="@{isprofskill}*{@{animalhandling1ranks},{30}}kh1}" Where isprofskill is either 1 if the checkbox is checked and 0 if not times the lesser of the number of skill ranks or 30 

the checkbox value should be 1. When a checkbox is unchecked, it always   equals 0. When it is checked, it takes the value listed in the value= tag. So in your version, it is 0 when unchecked, and also 0 when checked.  Unrelated, I'd dump all those spans, and the title parameter isnt all that useful on roll20, so I'd rewrite those as: <input type='checkbox' class="sheet-table-data-skills" name='attr_isprofskill' value='1'  /> <input type="number" class="sheet-table-data-skills" name="attr_animalhandling1catbonus" value="@{isprofskill}*{@{animalhandling1ranks},{30}}kh1}" disabled="true"> The important thing is changing the value to 0 anyway. Is that formula supposed to be a keep highest value? Any animal handling ranks below 30 will be 30. Edit:  also the input type should be "number".

You are right - it should be kl1 not keep highest.  Thanks