Augmentation to Starduck$$s Coffee $($Problem $5$ in Book Module $8).$ It $$adds$$ this on top of the problem, subject to the changes noted below.

Besides $$It$$s to Quack For$($ITQF$),$ Starduck$$s also wishes to blend a new coffee $$All$-$Star Flavorful Coffee$($AFLAC$).$

All the requirements for ITQF remain the same as before $($at least $475$ lbs$.,$ vanilla $>=20\%,$ RB $>=5\mathrm{.}7,$ CR $>=3\mathrm{.}75).$

The foundational coffee attributes remain the same.

We still have an unlimited supply of REG and VAN, now consider having $200$ lbs$.$ of DARK$1$ available and $250$ lbs$.$ of DARK$2$ available.

We wish to blend at least $150$ lbs$.$ of AFLAC. All told, we$$d also like to blend at least $700$ total lbs of ITQF and AFLAC combined.

We have greater flexibility in blending AFLAC $$ three requirements. No more than $40\%$ of the blend can be REG coffee. At least $30\%$ of the blend must be DARK $2.$ Must have a robustness average of at least $5\mathrm{.}2.$

Optimize production of the two coffee types to minimize cost.