Definition: Given a text, write a compressed version of it in a single sentence.
Input: Ralston attributed its fourth-quarter slump partly to higher costs of ingredients in the pet food business as well as competitive pressures, which required higher advertising spending. For the year, pet food volume was flat, the company said.
Output:
Ralston attributed its 4th quarter slump to high costs of ingredients in the pet food business and competition, which required higher ad spending. This yr, pet food volume was flat.