Sheep yurt sizing

Bo Peep is in the yurting biz. There's a big demand for sheep yurts in Mongolia, Manitoba, and other M places.

Bo sells four models, and can make custom yurts, too. Here are the yurts Bo sells:

Here are the areas one sheep needs at minimum:

So if you had, say, 10 small sheep, 11 medium, and 8 big, you'd need at least 8 × 1.15 + 11 × 0.83 + 10 × 0.67 = 25.03 sq meters.

You also need a ventilator to prevent methane explosions. There are three models: Sipper (low flow), Gulper (medium flow), and Chugger (blast it!). The Sipper is cheap but less effective. If you use one, you'll need to add 22% to the area needed, so there's space around the sheep for the gas. The Gulper is better, but you'll still need to add 12%. The Chugger is... well, it sucks really well. No extra space needed.

Let's say you used the Gulper with the 10 - 11 - 8 sitch. You need 25.03 * 1.12 = 28 square meters.

What model yurt would the program recommend in this case? A Rambler.

Validate the input. Keep looping until the user enters valid deets. Rules:

• Small 🐑: integer from 0 to 100.
• Medium 🐑: integer from 0 to 70.
• Big 🐑: integer from 0 to 50.
• Ventilator: S, G, or C. Allow upper/lowercase. Allow extra spaces.

Some I/O:

Round Area required to the nearest integer.

More I/O.

Even more I/O.

Upload a zip of your project folder. The usual coding standards apply.