Myers Business Systems is evaluating the introduction of a new product. The possible levels of unit sales and the probabilities of their occurrence are given next:

Possible Market Reaction Sales in Units Probabilities

Low response $350\mathrm{.}20$

Moderate response $450\mathrm{.}20$

High response $600\mathrm{.}30$

Very high response $700\mathrm{.}30$

What is the expected value of unit sales for the new product?

Note: Do not round intermediate calculations and round your answer to the nearest whole unit.

What is the standard deviation of unit sales?

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.