I'll give you the set-up . . . part (b).
A box of Golden Oldies requires 0.3kg of wheat and 0.1kg of vitamins.
A box of Crunchy Bites requires 0.2kg of wheat, 0.1kg of sugar and 0.1kg of vitamins.
Suppliers deliver at most 1400kg of wheat, at most 400kg of sugar
and at most 500kg of the vitamins a week.
The profit is £0.90 on a box of Golden Oldies and £1.00 on a box of Crunchy Bites.
Let and and be the number of boxes of Golden Oldies
and Crunchy Bites the manufacturer can produce per week.
(b) Write down all the constraints for the problem.
Organize the given information . . .
The constraints are: . . . and, of course: .