The Roth IRA's principal difference from most other tax advantaged retirement plans is that, rather than granting a tax break for money placed into the plan, the tax break is granted on the money withdrawn from the plan during retirement.
DK is a UK (and maybe Australia - but not sure on that) weight of yarn ... Double knit or DK weight is heavier than sportweight and lighter than worsted weight. Here are the guage ranges for a 4 st st swatch. # of sts is the number of stitches in 4 inches.
Melange yarn is dyed before spinning. The yarn is produced from color printed tops or slivers. The color bands are short enough that each fiber has multiple colors. This results in a heathered effect after spinning. Think of the individual hairs of a tabby cat.