Birthday party planning

Tags
If
Challenge
No

Cthulhu like to throw birthday parties for his goatty friends. Help him figure out how many invitations to send.

Your workbook should start off like this:

Start

The user fills in the age and friends cells, and clicks the button. The program shows the number of invitations. Like this:

Output

The number of invitations is the number of friends times two. (Each friend brings a pal.)

For goats 10 years old or older, the number of invitations must be at least 20. So if an old goat has 2 friends, change the number of invitations to 20.

Here's some more sample output.

Old goat, many friends

Old goat, few friends

Hint: nested if.

Upload your worksheet. The usual coding standards apply.

Where referenced