Lazer Technologies Inc. $($LTI$)$ has produced a total of $20$ high$-$power laser systems that could be used to destroy any approaching enemy missiles or aircraft. The $20$ units have been produced, funded in part as private research within the research and development arm of LTI, but the bulk of the funding came from a contract with the U$.$S$.$ Department of Defense $($DoD$).$

Testing of the laser units has shown that they are effective defense weapons, and if redesigned to add portability and easier field maintenance, the units could be truckmounted.

The DoD has asked LTI to submit a bid for $100$ more units.

The $20$ units that LTI has built so far cost the following amounts and are listed in the order in which they were produced: Use Exhibit $6\mathrm{.}4$ and Exhibit $6\mathrm{.}5.$

$\backslash$table$[[\backslash$table$[[$UNIT$],[$NUMBER$]],\backslash$table$[[$COST$],[($$ MILLIONS$)]],\backslash$table$[[$UNIT$],[$NUMBER$]],\backslash$table$[[$COST$],[($$ MILLIONS$)]]],[1,$$$14\mathrm{.}0,11,$$$2\mathrm{.}3$