Liu Sales has two store locations. Sanford has fixed costs of $285,000 per month and a contribution margin ratio of 30%. Orlando has fixed costs of $540,000 per month and a contribution margin ratio of 70%. At what sales volume would the two stores have equal profits or losses?

a. $637,500.
b. $825,000.
c. $1,717,500.
d. Cannot determine with the information given.