PENNSAUKEN, N.J. — Net income of J&J Snack Foods Corp. in the first quarter ended Dec. 25 totaled $7,094,000, equal to 38c per share on the common stock, up narrowly from $7,091,000, or 38c, in the same period a year ago. Sales in the quarter were $155,632,000, up 4% from $149,102,000. Sales to food service customers increased $3,819,000, or 4%, in the first quarter, to $105,080,000. Soft pretzel sales to the food service segment increased less than 1%, to $24,384,000. Bakery product sales, excluding biscuit and dumpling sales and fruit and fig bars, increased $1,521,000, or 4%, driven by higher sales to private label customers. Biscuit and dumpling sales also rose, climbing 2% to $9,857,000. Sales of fruit and fig bars fell 23% during the quarter to $6,826,000, primarily due to lower sales to a single customer. “Our businesses, with the exception of our frozen beverages business, had a strong quarter,” said Gerald B. Shreiber, president and chief executive officer. “Our frozen beverages business, which includes ICEE, Arctic Blast, Slush Puppie and Parrot Ice was impacted by higher expenses.”