Writes $3030 ("00") to var_money_digits34 and var_money_digits12 (all four money digits → "0000"). Then pops 4 return addresses from the stack (unwinds the full borrow chain: money_borrow_hi → money_borrow_mid → money_borrow_lo → deduct_money) and returns to the original caller. Money is clamped at zero — it cannot go negative.