Upgrades Cash vs Gold

gocubsgo0128

Does anyone know if there is a point where you can no longer use cash to upgrade? I played previous versions (2014) and after level 6 you had to use gold. My highest upgrade is level for one category is 12 and the next level still lets me use 100,000 blue cash, I am just trying to figure the best ways of spending.

Amused_79

gocubsgo0128 wrote: »

Does anyone know if there is a point where you can no longer use cash to upgrade? I played previous versions (2014) and after level 6 you had to use gold. My highest upgrade is level for one category is 12 and the next level still lets me use 100,000 blue cash, I am just trying to figure the best ways of spending.

To get to 15 it's 250000 cash. After that it's only gold.