Answer:
$1.263,000
Step-by-step explanation:
The amount of expenses to be included in P's selling expenses is calculated as follows:
Particulars Amount
Advertising $364,000 
Freight out $225,500 
Rent for office space $270,000 (540,000*1/2)
Sales salaries & commissions $404,000 
Total $1.263,000
So, the total amount to be included in selling expenses is $1.263,000.