Here's the code in either C or C#:

return ( (price > 100) ? 10 : 5);

Computer languages are for people. It should really be more like this:

    #
    # Description of what this does.
    #
    PRICE-THRESHOLD = 100
    LOWER-PRICE = 5
    UPPER-PRICE = 10

    IF PRICE > PRICE-THRESHOLD RETURN UPPER-PRICE
    ELSE RETURN LOWER-PRICE

Alternatively, use Excel:

    =IF( (price > 100), 10, 5 )

Excel is cryptic, but a lot of finance people understand it.