I want all bundle product price should be like: 55.225 including sales or order pages in admin panel
From my understanding, you would need to take a close look at
Further investigating you would need to adjust the precision to 3 instead of 2:
This thread has more details on implementing such as well, it looks as though Magento also does some price formatting else where also:
return number_format($value, 3, null, '');
I know its not a definitive answer but hopefully leads you in the right direction.