Answer and Explanation :
As per the data given in the question,
The journal entries are shown below:
a)
Factory labor A/c Dr. $24,041
To Labor rate variance Cr. $841 ($24,041 - $23,200)
To Wages payable Cr. $23,200
(Being factor payroll is recorded)
b) Work in process inventory A/c Dr $25,240 (3,580 × $24,041 ÷ 3,410)
To Labor efficiency variance Cr. $1,199 ($25,240 - $24,041)
To Factory labor $24,041
(Being assigning of payroll to work in process inventory is recorded))