If a person wants to find red heart yarn on sale they can go to a place like Micheals that specializes in crafts or a place like Walmart or Target that carries crafts.
One can by Yarn at a discount from a number of retailers. It is available to buy from 'Knitting Warehouse', 'Smiley's Yarns', 'Yarn Paradise' and 'Discount Yarn Sale'.
On another site, I found that one lady uses Red Heart Super Saver yarn in the color carrot for Clemson.
Coats and Clark has a store locator on their web site. You can call the stores in your area and see if they carry the specific yarn you are looking for. You can also order this yarn online but would have added shipping charges.
You may want to try Michaels or another store that sells yarn. If it's brand new it may not be on the shelves so you may have to order it on line.
How can you find out the yarn count on the basis of gsm?
The color Farmland has been discontinued be Red Heart. You would have to try auction sites like eBay and hope you get lucky.
how to calculate gsm from yarn count
Spotlight
Holding your yarn to get smooth even stitches in crocheting can be different for each person. It depends on what the person is comfortable with.
A yarn label gives the gauge using the hook recommended for that yarn. If you are working a pattern in 4 play worsted weight yarn but using an E hook, your pattern may give you the gauge. Given you do not have a pattern from which to work, you will have to make a swatch to determine the gauge as it is different from person to person depending your personal tension as you work.
According to Yarns-And, there are yarn standards, which you can review by following the link, below.
There are many sites in which one can find the nearest Yarn Store. Sometimes there are always informations in advertisements of newspapers and magazines.