SOEWIOU 12-Digit Desktop Calculator OS-200T-Gray

Compact Tax Calculator

The SOEWIOU OS-200T-Gray is a 12-digit desktop calculator built for accountants, business owners and professionals who need quick tax calculations. Dedicated TAX+/- keys let you set rates instantly while GT, MU and memory functions handle budgeting and markup tasks. A 30-degree angled LCD shows operation symbols during continuous entry, reducing errors. The gray plastic housing measures 101 by 143 by 25 mm and weighs 79 g.

Dual Power and Desk Footprint

Solar cells power the unit in normal light and a backup battery takes over when illumination drops, with an automatic shutdown after eight minutes of inactivity. No cables or external adapters are required, freeing desk space and eliminating a power socket. The slim profile at 0.1 inches high fits alongside keyboards or ledgers, and the angled display stays readable without a monitor riser. Large ABS keys follow finger curvature for comfortable extended sessions.

Sustained Office Workload

The calculator maintains response during long columns of figures because the dual supply prevents interruption when lighting changes. Memory keys M+, M- and MRC accumulate intermediate results without re-entry, and the GT register stores each equals press for a running grand total. Constant calculation mode repeats the last operation for repetitive multiplication such as 5×5×5×5+2+2=62. Mark-up logic delivers gross profit margin directly, for example 100 ÷ 15 MU returns 117.65.