Parker Inc. has the following costs when producing $100,000$ units:

Variable costs

$$600,000$

Fixed costs

$900,000$

An outside supplier is interested in producing the item for Parker. If the item is produced outside, Parker could use the released production facilities to make another item that would generate $$150,000$ of net income. At what unit price would Parker accept the outside supplier's offer if Parker wanted to increase net income by $$120,000?$

a$.$ $$8\mathrm{.}70$

b$.$ $$7\mathrm{.}50$

c$.$ $$5\mathrm{.}70$

d$.$ $$6\mathrm{.}30$