Final answer:
The relevant cost to Susan's food budget decision is the incremental cost of $300, which is the increase from her current budget of $400 to the anticipated budget of $700 if she hosts the family reunion.
"The correct option is approximately option D"
Step-by-step explanation:
When considering the cost relevant to Susan's decision on whether to host a family reunion in June, we need to look at the incremental cost, which is the additional amount that her food budget would increase by. Susan's current food budget is $400, and if she decides to host the family reunion, it would increase to $700. Therefore, the incremental cost, which is the relevant cost for her decision, would be the difference between the two amounts.
So, we take the anticipated budget with the family reunion, $700, and subtract the current food budget, $400, to arrive at the incremental cost:
$700 (anticipated budget) - $400 (current budget) = $300
The dollar amount pertaining to Susan's June food budget that is relevant to this decision is therefore $300.