Bushnell's lowest price scope is the Banner. I suspect that this is what you have. It retails around $75 +/-. It is an economy scope and is often included in rifle/scope combo so called "package" deals.
You need to find some turrret covers, otherwise dust and moisture will contaminate the adjust ent turrets and may eventually corrode enough to breach into the scope tube itself. If you cannot find any covers, I suggest that you "tape" over the adjustment turrets with black electrical tape. Looks like heck, but will help keep the moisture out.