I'm a very new knitter and crocheter and am working a purse that involves both. I finished the bottom of the bag--its a crocheted round with 116 scs in the last rnd. Now I'm supposed to "use circular needles and MC to knit into front and back of each sc around bag bottom - 232 st. Join, marking for beg of rnd and carry marker up. Work even in k2, p2 ribbing for 8 in." I can't figure out how to knit the round onto my needles, or what exactly I'm supposed to join. Does anyone have any suggestions? Thanks!