First, multiply the price of each item by the number of items to find the total amount of money spent on each:
2 packages of corn for $0.99 each
[tex]2\times0.99=1.98[/tex]3 gallons of milk for $2.90 each
[tex]3\times2.90=8.70[/tex]A loaf of bread: $1.29
Then, add all the quantities to find the total price for all the purchases:
[tex]1.98+8.70+1.29=11.97[/tex]Substract the total price of the purchases from $20.00 to find the amount of change that Sasha gets back:
[tex]20.00-11.97=8.03[/tex]Therefore, the amount of money that she gets back, is:
[tex]8.03[/tex]