Simplify the following text for a Grade 5 native English-speaking person.
Original: The first year Lightning Bar stood as a breeding stallion his stud fee , the amount charged to breed a mare to him , was $ 250 ( approximately $ as of ) but only nine mares were bred to him .
Simplified: The first year Lightning Bar stood as a breeding stallion , his stud fee , or the fee charged to breed a mare to him , was $ 250 ( $ as of ) . Only nine mares were bred to him .