Answer:
The journal entries are as follows:
(a) raw materials $4000 on account
Material inventory A/c Dr. $4,000
To Accounts payable A/c $4,000
(b) Factory labor $6000 of which $5200 relates to factory wages payable and $800 relates to payroll taxes payable
Work in process A/c Dr. $6000
To Factory wages payable $5,200
To Payroll taxes payable $800
(c) utilities payable $2000
Factory overhead A/c Dr. $2000
To Utilities payable $2000