Garza Electronics expects to sell $500$ units in January, $250$ units in February, and $1,000$ units in March. January$$s beginning inventory is $700$ units. Expected sales for the whole year are $7,200$ units. Garza has decided on a level monthly production schedule of $600$ units $(7,200$ units$/12$ months $=600$ units per month$).$ What is the expected end$-$of$-$month inventory for January, February, and March?