Final answer:
The total cost of Dave and Deena's engagement party invitations is $111.70. When divided by two, each family owes $55.85. The correct option is (a) Each family owes $55.85.
Step-by-step explanation:
Dave and Deena's engagement party invitation costs can be calculated by adding the cost of the invitations, the upgrade to foil-lined envelopes, the shipping cost, and the extra rush order fee together. The calculation is as follows:
- Invitations: $64.00
- Foil-lined envelopes upgrade: $24.75
- Shipping: $12.95
- Rush order fee: $10.00
Total cost = $64.00 + $24.75 + $12.95 + $10.00 = $111.70.
Since the families decide to split the cost equally, each family's share will be $111.70 divided by 2. Therefore:
Each family's share = Total cost ÷ 2
Each family's share = $111.70 ÷ 2 = $55.85.
The correct answer to the question is "Each family owes $55.85 toward the cost of the invitations." This is option (a) as presented in the problem statement.