$1$ Exercise A$.$

We use implication to express the standard $$if$...$then...$$ argument. For example,

to express the sentence $$If John says well then he will win$$ in logic, we can let

P $=$John plays well$$ and W $=$John will win$$ and write P $->$ W$.$

Express the following sentences in logic:

$$ If the demand has remained constant and prices have been increased, then

turnover must have decreased.