On March $1,$ Portland Company had $22,000$ units of work in process in Department A$,$ which were $100\%$ complete as to material costs and $40\%$ complete as to conversion costs. During March, $230,000$ units were started in Department A and $220,000$ units were completed and transferred to Department B$.$ Work in process on March $31$ was $100\%$ complete as to material costs and $50\%$ complete as to conversion costs. By what amount would the equivalent units for conversion costs for the month of March differ if the FIFO method were used instead of the weighted$-$average method?