On Tuesday she sells 5 crates * 2 = <<5*2=10>>10 crates of eggs.
On Wednesday she sells 10 crates - 2 crates = <<10-2=8>>8 crates of eggs.
On Thursday she sells 1/2 * 10 crates = <<1/2*10=5>>5 crates of eggs.
She sells a total of 5 crates + 10 crates + 8 crates + 5 crates = <<5+10+8+5=28>>28 crates of eggs.
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