Rooney Ltd has recorded the following sales for the first three months of $2011$:

January $\pounds 30,000$

February $\pounds 35,000$

March $\pounds 42,000$

$70\%$ of sales are paid for immediately in cash. Of the remaining $30\%$ of sales, $60\%$ are paid for $1$ month later, $30\%$ are paid for $2$ months later, and $10\%$ become bad debts.

How much cash is expected to be received in March? Calculate.