A H decided to pass on all cost increases to its customers, therefore, the $5increase in variable cost means that the new selling price of $120will represent a $10unit contribution increase.
Or,
Since unit contribution is the difference between the selling price and its variable cost, according to the figures from the table in 2023, $120-$70=$50, which is a $10increase in contribution from 2022.
Candidates do not have to word their responses in exactly the same way.