Profit: $\displaystyle P=210O_1+175O-2+190O_3-28(A+B)$ - other cost terms that I missed originally because it was difficult to view the question and type the post at the same time.
Outout1: $\displaystyle O_1-(0.08B+0.2C)=0$
Output2: $\displaystyle O_2-(0.4C+0.3D)=0$
Output3: $\displaystyle O_3-(0.1A+0.4D)=0$
Intermediate: $\displaystyle I=0.5A+0.55B+0.3R\ge0$
Waste: $\displaystyle W=0.4A+0.37B+0.4C+0.3D-R=0$
Non-negativity: $\displaystyle O_1,O_2,O_3\ge 0$
CB
OK the corrected Profit (per hour)
Profit: $\displaystyle P=210O_1+175O-2+190O_3-28(A+B)-32A-31B-25C-35D-45R$
$\displaystyle A \le 50$
$\displaystyle B \le 50$
$\displaystyle C \le 50$
$\displaystyle D \le 50$
$\displaystyle R \le 60$
Where $\displaystyle O_1,O_2,O_3,A,B,C,D,R$ are in units of tonnes per hour
CB