Answer
a) $15
Step-by-step explanation:
We will use the formula for Total labor variance to arrive at Standard rate.
Total labor variance = (Actual hours × Actual rate) - (Standard hours × Standard rate)
Substituting the data above into the formula, we'll have;
-$23,000 = (4,000 × $13) - (5,000 × SR)
-$23,000 = $52,000 - 5,000SR
Collect like terms
5,000SR = $52,000 + $23,000
5,000SR = $75,000
SR = $75,000 / 5,000
SR = $15