Consider the following two alternatives:

Alternative $1$ has a first cost of $$325,000,$ an annual maintenance and operating cost of $$20,575,$ and no salvage value. In addition, it requires two workers at a rate of $$25/$hour to output $5$ units per hour.

Alternative $2$ has an initial cost of $$270,000,$ an annual maintenance and operating cost of $$12,300,$ and a salvage value of $$125,000.$ In order to produce $3$ units in an hour, three$$workers are required a rate of $$15/$hour$.$

Given that the common parameter is $"$x units per year", what is the annual variable cost for Alternative $1?$