If we are solving a 0-1 integer programming problem, the constraint x1 + x2 ? 1 is a ________ constraint

Samuel's, Inc. sold $15,000 of 6% bonds to an individual on April 1 at par value. The bonds pay interest on June 30 and December 31 each year. What are the proper entries for the sale of the bonds and the June 30 payment of the interest for these bonds?

A) Account Debit Credit April 1 Cash 15,225 Interest Payable 225 Bonds Payable 15,000 Account Debit Credit June 30 Interest Expense 225 Interest Payable 225 Cash 450 B) Account Debit Credit April 1 Cash 15,000 Bonds Payable 15,000 Account Debit Credit June 30 Interest Expense 450 Cash 450 C) Account Debit Credit April 1 Cash 15,450 Interest Payable 450 Bonds Payable 15,000 Account Debit Credit June 30 Interest Expense 450 Interest Payable 450 D) Account Debit Credit April 1 Cash 15,300 Interest Payable 300 Bonds Payable 15,000 Account Debit Credit June 30 Interest Payable 300 Interest Expense 150 Cash 450

A sofa sells for $849. The cost of the sofa is $428. What is the markup rate of the sofa?

A) 30% B) 48% C) 50% D) 98%