$1.$ It has been found that there is a linear relationship between sales volume $($V$)$ and total cost $($C$).$

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If V $=20,000$ units, then C $=$ $$73,000$

If V $=25,000$ units, then C $=$ $$88,000$

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What is the total cost for a sales volume of $22,000$ units?

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A$.[]$ $$13,000$

B$.[]$ $$66,000$

C$.[]$ $$79,000$

D$.[]$ $$81,000$