how many total blocks would be needed to build the model for the given base plan

[2] [1] [3]
[1] [2]
[2]

To determine the total number of blocks needed to build the model for the given base plan, you will need to count the number of blocks in each row.

In the first row, there are three blocks: [2], [1], [3].
In the second row, there are two blocks: [1], [2].
In the third row, there are two blocks: [2].

To calculate the total number of blocks, you add up the number of blocks in each row.

3 + 2 + 2 = 7

Therefore, you would need a total of 7 blocks to build the model for the given base plan.