May take a bit longer than a week currently. They have been all over the fields here getting samples, might be backlogged a little.
But I use our local Extension office.
Meriwether was $10 a bag, $8 if you did 4 or more bags. When I did mine they give you phosphorus, potassium, calcium, magnesium and zinc levels. Also the current ph. Be sure to tell them what you are planting, write it on the bag, and they will include recommendations on what to add and how much. Directions on how to collect the sample are on the bag.