Lowe's has 35lb Pennington Lawn Booster Seed + Fertilizer for as low as $9.99 on clearance and in store only
https://brickseek.com/lowes-inventory-checker/?sku=1000682919 -enter your zip to find it near you
https://www.lowes.com/pd/Pennington-Lawn-Booster-Sun-and-Shade-35-LB/1000682919
They also have the 10lb bag of the same product for less than $4
https://www.lowes.com/pd/Pennington-Lawn-Booster-9-6-lb-1300-sq-ft-9-Lawn-Fertilizer/1000680785
https://brickseek.com/lowes-inventory-checker/?sku=1000682919 -enter your zip to find it near you
https://www.lowes.com/pd/Pennington-Lawn-Booster-Sun-and-Shade-35-LB/1000682919
They also have the 10lb bag of the same product for less than $4
https://www.lowes.com/pd/Pennington-Lawn-Booster-9-6-lb-1300-sq-ft-9-Lawn-Fertilizer/1000680785