Complex sentence: While it may be easy to compare the base price of an item online, it may not be easy to see the total cost up front as additional fees such as shipping are often not be visible until the final step in the checkout process.
Split into simpler sentences: While it may be easy to compare the base price of an item online, it may not be easy to see the total cost up front. Additional fees such as shipping are often not be visible until the final step in the checkout process.