pls help:

ALLOCATING OPERATING EXPENSERELATIVE NET SALES Hayley Doll owns a car stereo store. She has divided her store into three departments. Net sales for the month of July are as follows:

Deluxe: $33,600

Standard: $38,400

Economy: $48,000

Advertising expense for July was $20,000.

Allocate the advertising expense among the three departments on the basis of relative net sales.

Exercise 25-3A Deluxe Standard Economy Total Deluxe Standard Economy Allocation of advertising expense: Deluxe Standard Economy