Using excel $3.$ NIA Motor is an e$-$scooter manufacturer that employs ten people at $$15$ per hour. Assume you were tasked to track productivity performance measures using the data shown in the following table:

Financial Information $2018$ Results

Net sales $$400,000$

Current assets $$108,000$

Net income after taxes $$88,200$

Current liabilities $$44,000$

Cost of goods sold $($purchased items$)$ $$50,000$

Avg. inventory value $$16,000$

Inputs and Outputs

Scooters produced $4,000$

Labor hours $9,600$

Lease payments $$40,000$

a$.$ Calculate the labor productivity, lease productivity, and material productivity.

b$.$ Calculate the multiple$-$factor productivity. If the multiple factor productivity for $2017$ was $0\mathrm{.}008$ scooter$/$dollar$,$ then what was the productivity growth from $2017$ to $2018?$