The Sanders Garden Shop mixes two types of grass seed into a blend. Each type of grass has been rated $($per pound$)$ according to its shade tolerance, ability to stand up to traffic, and drought resistance, as shown in the table. Type A seed costs $$1$ and Type B seed costs $$2.$ If the blend needs to score at least $300$ points for shade tolerance, $400$ points for traffic, and $750$ points for drought resistance, how much will the blend cost?

Type A

Type B

Shade

$1$

$1$

Traffic

$2$

$1$

Drought

$2$

$5$