Purchase$-$Related Transactions

A retailer is considering the purchase of $500$ units of a specific item from either of two suppliers. Their offers are as follows:

Supplier One: $$40$ a unit, total of $$20,000,1/10,$ n$/30,$ no charge for freight.

Supplier Two: $$39$ a unit, total of $$19,500,2/10,$ n$/30,$ plus freight of $$500.$

Price of Supplier One:

$fill in the blank $1$

Price of Supplier Two:

$fill in the blank $2$

Which of the two offers, Supplier One or Supplier Two, yields the lower price?