[Bruno13]

I don't understand yet what is your problem, if is the variable float that don't change or the output that can't be in float, or both.

Anyway, your code need a better performece and you need more debugs to know what is the problem.
Btw, your specifier in debug message are wrong, to float is used %f.

Look this:

PHP код:

new Float:kof = 1;//str[400];
//debugs
printf("playerDB admin level = %d", playerDB[i][admin]);
printf("playerDB vip level = %d", playerDB[i][vip]);
switch(playerDB[i][admin])
{
    case 5: kof = 2;
    case 4: kof = 2;
    case 3: kof = 1;
    case 2: kof = 0.7;
    case 1: kof = 0.4;
    default:
    {
        if(playerDB[i][vip]) kof = 0.2;
    }
}
printf("kof output = %.1f", kof);//.1 = only one decimal place
playerDB[i][VersloPelnas] += playerDB[i][VersloPajamos];
//format(str, sizeof(str), "Verslo koficijentas yra %d", kof);
//SendClientMessage(i, RED, str );