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How to set the initial value for Select item?

From the latest plugin update (Version 1.2.1) , initial value can be set in Cost Calculator Item Settings.

In order to set initial value for Select item, you need to add the index of the item you want to display as initial, in 'Initial select list index' field.

For example, if you have three items in Select field, and you want the second one to be initial, you would add number 2 to the field.