Skillings Industrial Chemicals, Inc.

$$ Operates a refinery near Ohio River

$$ To produce $1$ lb$.$ of Primary Product requires:

$1$ lb$.$ of Material A

$2$ lbs$.$ of Material B

$$ Other outputs of the production process:

$1$ lb$.$ of liquid waste

$1$ lb$.$ of solid waste

$$ Primary Product sells for $$5\mathrm{.}70$ per lb$.$