Zach had some money. He spent 40% of it on some toys and of the remainder on food. After that, his parents gave him $90. The ratio of the total amount of money he had in the end to the amount of money he had at first was 7 : 4. How much money did Paul have at first?

Jason and Lisa had some money in their bank. After Jason and Lisa managed to save $189 and $81 respectively, the amount of money Jason had was twice of Lisa. If initially, the money Jason and Lisa had in the bank were in the ratio 5 : 7, how much did Jason have after saving?

At first, Ben had $90 and Chandra had $48. Each bought a shirt at the same price. The amounts of money Ben and Chandra had left were in the ratio 4:1. How much did the shirt cost?

The ratio of Ethan to Noah's savings was 3 : 7 at first. After Ethan saved another $121 and Noah saved another $44, Ethan had twice of Noah. How much did Ethan have in the end?

The ratio of Julie to Joseph's savings was 4 : 7 at first. After Julie saved another $180 and Joseph saved another $60, Julie had twice of Joseph. How much did Julie have in the end?

The ratio of Ben to Bryan's savings was 2 : 3 at first. After Ben saved another $194 and Bryan saved another $71, Ben had twice of Bryan. How much did Ben have in the end?