A fruit stand sells 6 oranges for $3.00 andan 3 grapefruit for $2.40. Lionel buys 10 oranges and 11 grapefruit. How much does Lionel spend on the fruit?

Each of the oranges would sell for 50 cents so 10*0.50=5 dollars

And for the grapefruit each cost 80 cents so 11*0.80=8.80

So in total he would spend 13 dollars and 80 cents.