Adjust Checkout and Recurring Price based on Frequency and Type

functions.php

 // Adjust Scheduled Order Checkout Price.
 function xx_adjust_checkout_price( $checkout_price, $product_id, $frequency_type, $frequency ){

  // Adjust the checkout price based on the frequency and type
  if ( ( 'Days' == $frequency_type ) && ( 1 == $frequency ) ){

    $discount_pct = .5;

  } else if ( ( 'Weeks' == $frequency_type ) && ( 1 == $frequency ) ){

    $discount_pct = .25;

  } else if ( ( 'Months' == $frequency_type ) && ( 1 == $frequency ) ){

    $discount_pct = .10;
  }

  return $checkout_price - round( $checkout_price *   $discount_pct , 2 );
 }
 add_filter(  'autoship_checkout_price', 'xx_adjust_checkout_price', 10, 4 );


 // Adjust Scheduled Order Recurring Price.
 function xx_adjust_recurring_price( $scheduled_order_item_data, $frequency_type, $frequency ) {

  // Adjust the recurring price based on the frequency and type
  if ( ( 'Days' == $frequency_type ) && ( 1 == $frequency ) ){

    $discount_pct = .5;

  } else if ( ( 'Weeks' == $frequency_type ) && ( 1 == $frequency ) ){

    $discount_pct = .25;

  } else if ( ( 'Months' == $frequency_type ) && ( 1 == $frequency ) ){

    $discount_pct = .10;
  }

  $scheduled_order_item_data["SalePrice"] = $scheduled_order_item_data["Price"] - round( $scheduled_order_item_data["Price"] *   $discount_pct , 2 );

 	return $scheduled_order_item_data;
 }
 add_filter( 'autoship_get_scheduled_order_item_product_data', 'xx_adjust_recurring_price', 11, 3 );