The Peterson company incurred the following revenue and costs in the month of May:

Sales Revenue $$57,000$

Direct Materials $$12,000$

Variable Selling Costs $$5,000$

Direct labor paid $$9,000$

Mfg$.$ Plant Utility Costs $$19,000$

Fixed Adv. Costs $$2,000$

$1.$The company$$s gross margin is $?$

$2.$If $$10,000$ of the mfg plant utility costs were fixed $($and rest variable$)$ then the Contribution Margin was?

$3.$If companys revenue is $$530,000,$ profit before taxes $$98000,$ and product costs are $$390,000$ then the companys period costs total is$?$

$4.$If fixed Costs are $$15,000,$ operating income is $$55,000,$ revenues are $$160,000,$ variable costs are $$90,000,$ total Contribution Margin is$?$