The baum and the freeman families are comparing their electric bills for the past month. the baum family is on a standard use plan and the freeman family is on an interval use plan. each family’s usage is listed on the chart below:

standard use plan
interval use plan
8.5 cents/kwh for the first 400 kwh
12 cents/kwh for the next 400 kwh
14.5 cents/kwh for anything over 800 kwh
on-peak hours - 13 cents/kwh
off-peak hours - 2 cents/kwh

both families use 1250 kwh for the given 30 day period. the freeman family uses 400 kwh during on-peak hours and 850 during off-peak hours. which family ends up paying more for their utilities? how much more?
a.
the freeman family pays $260.83 more than the baum family.
b.
the freeman family pays $250.00 more than the baum family.
c.
the baum family pays $69.00 more than the freeman family.
d.
the baum family pays $78.25 more than the freeman family.