A piece of pie costs. 10 and a cup of coffee costs. 5. How much will 40 pieces of pie and 20 cups of coffee cost?

One pie costs 0.10

you are buying 40 pies so ...

40 x 0.10 = $4

one cup of coffee costs 0.50

you are buying 20 coffee so ...

20 x 0.50 = $10

$4 + $10 = $14

It costs $14 to buy 40 pieces of pie and 20 cups of coffee

40 pieces of pie will cost $4 and 20 cups of coffee will cost $1