The balance in the supplies inventory account was $23982 at the beginning of the year. During the year, a total of $115437 of supplies were purchased. These were debited to the supplies expense account. At year end, a count of office supplies revealed that there was $11256 of office supplies on hand. What is the office supplies expense for the year?

a. $11256

b. $128163

c. $115437

d. $102711