Assuming that the product cost concept is used, determine the following:

b$.$ Markup percentage $($cost per unit is $175)$

c$.$ Selling price of the halogen light

$4.$ Assuming that the variable cost concept is used, determine the following:

b$.$ Markup percentage $($cost per unit is $167)$

c$.$ Selling price of the halogen light Note: Round all percentages to two decimal places then use in subsequent computations, if applicable. Round all dollar amounts to the nearest dollar.