1930s vintage cotton feed sack fabric, print plaid pattern in red, mint green, yellow

1930s or early 40s vintage print cotton feedsack fabric, a cute plaid in great colors - shades of red, mint green, butter yellow. This is 36" wide across the selvages, about 33" long (not quite a full yard of fabric). Colors are nice and bright, and there's no rips or holes. There's some yellowing or soil (see photos) which looks to me like it'll wash out. I haven't washed this.