Building a wall.

I have been working on the wall a little bit every day, so I am making progress. But I miss counted how may blocks I need to place. I thought that each pallet contained 50 blocks, but the pallets are 75 blocks each. Instead of 200 block that need to be installed, I need to install 300 blocks. I have installed almost 75 blocks, so I only need to install 225 more to complete the wall.