Fill in at "current Cash" your current cash (without any "." or spaces, e.g. "1000000"), if your current cash is negative just use "-", e.g. "-250000".

Don't forget: in case of firing one or more economists, you have to pay one week's wage. Hattrick calculates the income with the current cash in brackets. If your current cash is negative Hattrick calculates with the paid interest the week before.