In this question : At The Last entry why we transfer incorporation expenses and underwriter commissionAC in profit and loss account what is the reason behind it.....

Dear student,
​​​​​​Profit and loss Account is prepared to calculate the net profit earned or net loss incurred during the year which records indirect incomes and indirect expenses (which are not directly related to production), as incorporation expenses and underwriting commission are indirect expenses so that's why these are debited to the profit and loss account.
Regards.