The Farmer's Market buys fresh New Jersey corn each Monday from a large distributor.  By the end of the weekend, all unsold corn is sold to a poultry farm to feed their animals. The Farmer's Market pays $12/crate for the fresh corn and sells it to customers for the equivalent of $27/crate.  The poultry farmer pays $3/crate for the week-old corn.  Based on previous sales, on average the Farmer's Market sells 145 crates of corn with a standard deviation of 26 crates.

How many crates of corn should the supermarket purchase each Monday?