Final answer:
The insurer will give Rosa one check for $60,000.
Step-by-step explanation:
The insurer will give Rosa one check for $60,000.
In this scenario, Rosa's barn was fully insured at replacement cost. The insurance policy covers the cost of replacing the barn, so the insurer will give her a check for the full amount required to replace the barn, which is $60,000.
This means Rosa will be able to use the $60,000 check to rebuild her barn and cover the cost of repairs.