The Flynn Insurance Company developed standard times for processing claims. When a claim was received at the processing center, it was first reviewed and classified as simple or complex. The standard time for processing was:

Simple claim $30$ minutes

Complex claim $1\mathrm{.}5$ hours

Employees were expected to be productive $7\mathrm{.}5$ hours per day. Compensation costs were $$120$ per day per employee. During November, which had $20$ working days, the following number of claims were processed:

Simple claims $3,600$ processed

Complex claims $800$ processed

Required:

a$.$ Calculate the number of workers that should have been available to process November claims.

b$.$ Assume that $22$ workers were actually available throughout the month of November. Calculate a labor efficiency variance expressed as both a number of workers and a dollar amount for the month.