Я потратил много денег в этом месяц

Я потратил много денег в этом месяце, и сейчас должен сократить свои расходы.

Results (English) 1:

I spent a lot of money this month and now has to reduce its costs.

Results (English) 2:

I spent a lot of money this month, and now have to reduce their costs.

Results (English) 3:

I spent a lot of money for this month, and now I must reduce their costs.