Beth is a second$-$grader who sells lemonade on a street corner in your neighborhood. Each cup of lemonade costs Beth $20$ cents to produce; she has no fixed costs. The reservation prices for the $10$ people who walk by Beth's lemonade stand each day are listed in the following table.

$\backslash$table$[[$Person$,$A$,$B$,$C$,$D$,$E$,$F$,$G$,$H$,$I,J$],[\backslash$table$[[$Reservation$],[$price$]],$$$1\mathrm{.}00,$$$0\mathrm{.}90,$$$0\mathrm{.}80,$$$0\mathrm{.}70,$$$0\mathrm{.}60,$$$0\mathrm{.}50,$$$0\mathrm{.}40,$$$0\mathrm{.}30,$$$0\mathrm{.}20,$$$0\mathrm{.}10$