Leverage Above 500 And Cheap Currencies

Hello BabyPips.

To the point:
I m sitting in front of a spreadsheet that shows a 3000 2000 1000 or above 500 leverage
could burn your account after the order has been opened due to the spread cost.

Ive noticed spread rising on cheap currencies especially.

Am i right ? or too tired and have errors in my Excel calculations?

The way i calculate the maximum purchase power for a trade is :

Balance * Leverage/AssetPrice in USD * 100000(standard Lot)

Thanks