Castro Company's master budget includes estimated costs and expenses of $$700,000$ for its third quarter of operations. Truman, the company's controller expects $$500,000$ to be financeet with current payables. Depreciation expense for the quarter budgeted at $$70,000.$ Castro's prepayments balance at the end of the third quarter is expected to be twice that of its prepayments balance at the beginning of the quarter. Truman estimates the company will prepay expenses totaling $\backslash$$$200,000$ in the third quarter. What is Castro's budgeted prepayments balance at the end of the third quarter?