function calcMultiplier() public view returns (uint) {

        if (totalInvested <= 20 ether) {
            return 120;
        } else if (totalInvested <= 50 ether) {
            return 117;
        } else if (totalInvested <= 100 ether) {
            return 115;
        } else if (totalInvested <= 200 ether) {
            return 113;
        } else {
            return 110;
        }

    }