Flower planning, with the working shown.

Start with a tested arrangement. Turn it into an order you can explain, check and change.

Recalculate when one more table crosses a pack threshold
Follow the same twelve-vase plan to thirteen, including both suppliers and the revised make list.
Count shared flowers across recipes
Combine bouquets and table vases into one variety-level stem count, without buying twice.
Reserve, usable stock and pack surplus
Follow 72 rose stems through an explicit allowance, existing stock and full-pack order.
Round flower stems to supplier bunches
Calculate packs from net need and check whether a bunch is actually sold by stem count.
Compare two complete supplier orders
Work through pack costs, surplus and a CAD 342 versus CAD 344 comparison.
Update a recipe when a flower changes
Separate design suitability from stem arithmetic. Record replacements without losing the original plan.
From delivery to an arrangement make list
Receive, condition and allocate each batch. Keep reserve stems available for the work ahead.