A company will reimburse its employees’ personal expenses on weekend business trips. It will reimburse 0.80 for every 1.00 an employee spends, up to 100.00. For the next 200 an employee spends, the company will reimburse 0.70 for every 1.00 spent. For each additional dollar spent, the company will reimburse 0.60. If an employee was reimbursed 400.00, approximately how many dollars must she have spent on a weekend business trip?