費(ひ)用(よう) hiyouは wa彼(かれ) kareの no負(ふ)担(たん) futanになる ninaruだろう darou。 The cost will probably fall on him. Literal Costs [topic-は] his burden [into-に] become [probably-だろう]. 彼の負担になる means 'to become his burden' — he'll have to pay. ~だろう adds probability. money and financeprices and expenses~になる (become)~だろう / ~でしょう (probably)
費(ひ)用(よう) hiyouは wa彼(かれ) kareの no負(ふ)担(たん) futanになる ninaruだろう darou。 The cost will probably fall on him. Literal Costs [topic-は] his burden [into-に] become [probably-だろう]. 彼の負担になる means 'to become his burden' — he'll have to pay. ~だろう adds probability. money and financeprices and expenses~になる (become)~だろう / ~でしょう (probably)