Gridco, Incorporated $($Gridco$)$ owns the building in which its offices are located. On

April $1,$ Gridco insured the building with Olden Days Insurance Company $($Olden Days$),$

which issued a $$200,000$ face amount policy. The Olden Days policy contained a pro

rata clause. Keeping that policy in force, Gridco procured an additional policy on the

building on June $15.$ This policy, which had a $$600,000$ face amount and contained a

pro rata clause, was issued by Big City Insurance Corporation $($Big City$).$ On August $10,$

while both policies were in force, lightning $($a covered peril under each policy$)$ struck

the Gridco building. This sparked a fire that resulted in $$72,000$ of damage to the

warehouse. Gridco has filed claims and proofs of loss with both Olden Days and Big

City. Which of the following indicates the correct amounts the respective insurers mus

pay Gridco?