RIO DE JANEIRO (AP) — The Rio de Janeiro Olympics will become a tangible reality on Friday, when one of its so-called "Mega" souvenir shops opens on Copacabana Beach.

Bring plenty of cash, at least for anything more than a keychain that sells for 25 Brazilian reals ($8). A bikini with the Olympic logo will cost about $100, and a commemorative gold medal around $3,000.

Olympic merchandising is big business.

Rio's head of licensing and retail sales, Sylmara Multini, says organizers hope to sell merchandise worth about 1 billion Brazilian reals ($310 million).

The 1,800 square-meter (19,300 square-feet) layout on Copacabana is one of three huge stores. The largest will be a 5,000 square-meter (53,800 square feet) store in the Olympic Park, while the Athletes' Village shop will be 1,000 square-meters (10,750 square feet).