function edd_checkout_button_purchase() {

  ob_start();

  $enabled_gateways = edd_get_enabled_payment_gateways();
  $cart_total       = edd_get_cart_total();

  if ( ! empty( $enabled_gateways ) || empty( $cart_total ) ) {
    $color = edd_get_option( 'checkout_color', 'blue' );
    $color = ( $color == 'inherit' ) ? '' : $color;
    $style = edd_get_option( 'button_style', 'button' );
    $label = edd_get_checkout_button_purchase_label();

    ?>
		<input type="submit" class="edd-submit <?php echo $color; ?> <?php echo $style; ?>" id="edd-purchase-button" name="edd-purchase" value="<?php echo $label; ?>"/>
		<?php
  }

  return apply_filters( 'edd_checkout_button_purchase', ob_get_clean() );
}