Samsung is a manufacturer of smartphones. They make $60,000$ smartphones per mor hours at $$25$ per hour and uses raw material worth $40,000$ pounds $($lbs$)$ that costs $$3.$ $$15,000$ and their capital cost to complete the production is valued at $$20,000.$

What is their Single Factor Productivity?

Excel not required for this calculation.

a$.425$

b$.375$

c$.325$

d$.300$

e$.450$