my si age is 1/3 of my wifes age my wifes age is 4/5 of my age and my age is 3/5 of my fathers age find the age of my sin if my fathers is 50 years old​

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?