1000¥ (Japanese Yen) is equivalent to $8.00. A shirt costing 650% would cost how many dollars?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of