To determine the "original value," it's essential to understand what you're asking for in this context:1. If you're asking for the original sales value before the increase - The original sales value was 10,000 (the sales in January).2. f you're asking for the original sales value before a percentage increase - If you're looking for the percentage increase from 10,000 to 18,000: [tex]\[ \text{Percentage Increase} = \frac{\text{New Value} - \text{Original Value}}{\text{Original Value}} \times 100 \] \[ \text{Percentage Increase} = \frac{18,000 - 10,000}{10,000} \times 100 = 80\% \][/tex]In summary, the original value (sales in January) was 10,000 and the increase was 80% to reach 18,000 in the following month.