What power supply to choose

Oct 30, 2018
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I'm currently building PC:
CPU: Ryzen 7 1700x
GPU: gtx 1060 3GB
SSD: Samsung 970 EVO 500GB
RAM: Looking for DDR4 8GB at good price will get some probably
Motherboard: ASRock A320M-DGS
Box: Deepcool Tesseract
CPU cooler: Deepcool GAMMAXX 400

I have big problems about choosing power supply. The more i read about it the more confused i get. I'm looking for reliable power supply for my PC.but i have no idea how to get 1. I want to get something under $50 if possible. All the help is greatly apriciated i also wanna make sure i'm not forgeting anything else that i might need. The motherboard should be enough to get everything right? I haven't bought anything but that are my plans currently.
All the help and suggestions are greatly apriciated.