This Week’s Datebook

Monday

* Treasury bill auction.

* Campbell Soup Co. announces earnings.

Tuesday

* National Assn. of Realtors reports on existing-home sales for April.

* Conference Board releases the results of its monthly survey on consumer confidence.

* Union workers at SBC Communications Inc. plan to return to work after a four-day strike to protest the company’s latest contract offer. Both sides reported some progress in their negotiations Sunday.

* H.J. Heinz and Computer Associates International release earnings.

Wednesday

* Commerce Department reports on durable goods orders and new-home sales for April.

* Securities and Exchange Commission meets to act on new rules governing mutual funds.

* International Steel Group Inc. plans its first stockholder meeting since its initial public offering Dec. 17.

Thursday

* Commerce Department reports on gross domestic product, first quarter, preliminary.

* Labor Department reports on weekly jobless claims.

* Freddie Mac, the mortgage company, reports on mortgage rates.

* Costco Wholesale Corp. and Dollar General Corp. release earnings.

Friday

* Commerce Department reports on personal income and spending for April.

* Signing of Central American Free Trade Agreement.