Your lock function is not working on your own demo page. the switch is changeable and the total changes even if the select is set to false.
Attached files: Capture.PNG Capture01.PNG
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The calculator on our demo seems to be working properly - http://cost-calculator.bold-themes.com/new-main-demo/reset-value/.
If the 'Unlock switch, set to false' option is selected, switch will be initially set to false (or off) value. If it's locked, it will remain on true (on) value.
Let us know if you need help with anything else.
Regards, BoldThemes team
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