Assets at the beginning of the year amounted to P48,000 while liabilities were only 1/3 of this figure. By the end of the year, assets increased to 150% while liabilities decreased by 25%. If the owner made withdrawals of P9,000 while revenues generated totaled P75,000, the total expense incurred by business amounted to

a. 60 000

b. 72 000

c. 6 000

d. 38 000