For each phrase, select the most appropriate cost term. Each term is used only once. StatementsCost term$(1.)$ Increased revenues from special orderAnswer $1$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost$(2.)$ Lost contribution margin from foregone sales to regular customersAnswer $2$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost$(3.)$ Revenues from $4,000$ units sold to regular customersAnswer $3$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost$(4.)$ Variable cost of $4,000$ units sold to regular customersAnswer $4$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost$(5.)$ Increase in fixed selling and administrative expensesAnswer $5$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost$(6.)$ Cost of existing equipment used to produce special orderAnswer $6$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost$(7.)$ Salary paid to current supervisor who oversees manufacture of special orderAnswer $7$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost$(8.)$ Increased variable costs of special orderAnswer $8$Irrelevant fixed outlay costIrrelevant revenuesIrrelevant variable outlay costOpportunity costRelevant fixed outlay costRelevant revenuesRelevant variable outlay costSunk cost