Paolucci Corporation's relevant range of activity is $4,800$ units to $11,000$ units. When it produces and sells $7,900$ units, its average costs per unit are as follows:

If $6,900$ units are sold, the variable cost per unit sold is closest to:

Multiple Choice

$$19\mathrm{.}25$

$$11\mathrm{.}30$

$$14\mathrm{.}90$

$$13\mathrm{.}40$