Add Price Unit

Write the following code in your Child Theme function.php

add_filter( 'rtcl_get_price_unit_list', function ( $unit_list ){
	$unit_list['katha'] = [
		'title' => esc_html__("Katha", 'classima'),
		'short' => esc_html__("Per Katha", 'classima')
	];

	return $unit_list;
});