Alright, let's solve this problem step by step. We have 5280 and 403 and we're adding them together.

Step 1: We'll start by adding the digits 0 & 3 in column 1 and get 3.

Step 2: We'll start by adding the digits 8 & 0 in column 2 and get 8.

Step 3: We'll start by adding the digits 2 & 4 in column 3 and get 6.

Step 4: We'll start by adding the digits 5 & 0 in column 4 and get 5.

So, 5280 + 403 = 5683.

