Answer:
To calculate the total cost of invitations and postage, we first need to find the total cost of the invitations and then add the total cost of postage.
Cost of Invitations:
Each invitation costs $1.99.
Total cost of invitations = Cost per invitation × Number of guests
= $1.99 × 100
= $199
Cost of Postage:
Each invitation requires $0.97 in postage.
Total cost of postage = Cost per invitation in postage × Number of guests
= $0.97 × 100
= $97
Total Cost:
Total cost = Cost of invitations + Cost of postage
= $199 + $97
= $296
Therefore, the couple will pay a total of $296 for invitations and postage.