No problem, let's work through this together. We're starting with 6020 and 1263 and adding them all up.

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 2 & 6 in column 2 and get 8.

Step 3: We'll start by adding the digits 0 & 2 in column 3 and get 2.

Step 4: We'll start by adding the digits 6 & 1 in column 4 and get 7.

So, 6020 + 1263 = 7283.

