$5-44$ An elevator company has redesigned their prodG uct to be $50\%$ more energy efficient than hydraulic designs. Two designs are being considered for implementation in a new building.

$($a$)$ Given an interest rate of $20\%$ which bid should be accepted?

$\backslash$table$[[$Alternatives$,$A$,$B$],[$Installed cost$,$$$45,000,$$$54,000$