Complex sentence: She reported his arrival home from work several hours later than usual and extra mileage on the vehicle that her husband explained as resulting from a side trip he took to purchase a 6-pack of beer and then taking a longer route home.
Split into simpler sentences: She reported his arrival home from work several hours later than usual and also that extra mileage was on his car's odometer. Her husband explained the mileage as resulting from a side trip he took to purchase a 6-pack of beer and then taking a longer route home.