Based on your survey of number of units and sale prices per unit, multi$-$unit properties with between $5$ and $15$ units typically offer similar operating efficiencies. However, properties of $16+$ units are required to maintain an on$-$site property manager. The cost of an on$-$site manager is $$400$ per unit per year. As this expense is expected to continue indefinitely, it is valued using a perpetuity model at a $4\mathrm{.}00\%$ capitalization rate. The subject property is an apartment complex with $17$ units. Comparable Sale $1$ has $14$ units and sold at $$211,765$ per unit. What is the percentage adjustment? $($Please indicate if it is a positive or negative adjustment$)$