using Vensim program slove the fllowing

Amal has 678,530 dollar . In her bank account. Every week she earns 120,000. Each week 23,700 dollar is deducted from her pay check as pay for PAYE taxes and medicare. She spends 7,750 every week to go out for a movie and approximately 60,000 every three weeks for clothes.

How much money will she have in her bank account in four month (sixteen weeks from now).