Kindly help me with this General accounting questions not use chart gpt please fast given solution

I am searching for the accurate solution to this general accounting problem with the right approach.

Shimano Manufacturing makes a product that is expected to require 4 hours of labor per unit of product. The standard cost of labor is $6.50 per hour. Shimano actually used 3.80 hours of labor per unit of product. The actual cost of labor was $6.40 per hour. Shimano produced 1,600 units during the period. Based on this information alone, what is the labor price variance?