My god.

<?php
/*
Title: Test
Post Type: page
*/

piklist( 'field', array(
	'type'      => 'group',
	'field'     => 'rate_options',
	'label'     => 'Option Prices',
	'value'     => isset( $rate ) ? $rate->data : array(),
	'add_more'  => true,
	'fields'    => array(
		array(
			'type'       => 'text',
			'field'      => 'option_name',
			'label'      => 'Name',
			'required'   => true,
			'sanitize'   => array( array( 'type' => 'text_field' ) ),
			'attributes' => array(
				'placeholder' => 'Option Name',
			),
		),
		array(
			'type'     => 'select',
			'field'    => 'option_type',
			'label'    => 'Price Increase',
			'choices'  => array(
				1 => 'By Units',
				2 => 'Fixed',
				3 => 'Multiplier',
			),
		),
		array(
			'type'       => 'number',
			'field'      => 'option_rate',
			'label'      => 'Rate',
			'attributes' => array(
				'placeholder' => 'Rate',
				'step' => '0.01',
				'min' => '0',
				'style' => 'max-width: 100px',
			),
		),
		array( 
			'type'  => 'number',
			'field' => 'option_unit_size',
			'label' => 'Rate Units',
			'conditions' => array(
				array(
					'field' => 'rate_options:option_type',
					'value' => '1',
				),
			),
			'attributes' => array(
				'style' => 'max-width: 100px',
			),
		),
		array( 
			'type'  => 'number',
			'field' => 'option_min_cost',
			'label' => 'Minimum Cost',
			'attributes' => array(
				'step' => '0.01',
				'min'  => '0',
				'style' => 'max-width: 100px',
			),
			'conditions' => array(
				array(
					'field' => 'rate_options:option_type',
					'value' => '1',
				),
			),
		),
		array( 
			'type'  => 'number',
			'field' => 'option_max_height',
			'label' => 'Maximum Height',
			'conditions' => array(
				array(
					'field' => 'rate_options:option_type',
					'value' => '1',
				),
			),
			'attributes' => array(
				'style' => 'max-width: 100px',
			),
		),
		array( 
			'type'  => 'number',
			'field' => 'option_max_width',
			'label' => 'Maximum Width',
			'conditions' => array(
				array(
					'field' => 'rate_options:option_type',
					'value' => '1',
				),
			),
			'attributes' => array(
				'style' => 'max-width: 100px',
			),
		),
	),
) );