condused with book instructions

[gonzales1219]

Im making a doggie sweater and I'm a little confused as to what the instructions are saying. ok this is what they read;

2nd row: P1. K1.Rep. these 2 rows ribing for 4" ending on a 2nd row and increasing 1 stich in center of last row.

the part in bold is what i don't understand. I just started knitting but a couple weeks ago and still don't understand the short talk much. Please help me!! Thank you..