There should be an explanation of the cable parts of the chart in the book and lots of tutorials online somewhere, but on row 3, starting from the right and knitting across to the left, you have 9 stitches of stocking in the middle of 2 purl coloumns right? For row 3, knit up to and including the purl column, knit 3 normally, then C6F: i.e. put the next 3 stitches on a cable needle and hold to the front, knit the next 3 from lefthand needle, then knit 3 from cable needle.
That was: k3, C6F (which uses up 6 stitches altogether, 3 each way), for a total of 9 stitches (the whole stocking stitch part between the purl columns)
then do the purl, k2tog, purl (if those diagonal lines mean k2tog).
On row 7 if a right side row (which it must be) do the purls, when you get to the 9 stocking stitches do a C6B, then knit 3.
That's (put 3 stitches on cable needle and hold at the back, knit next 3 from left needle, knit 3 from cable needle), then k3 equals the 9 st st.s again, then the purl columns as before.