<prompt> Summarize the information provided below.Sales at River Technologies declined 6.2 in the first quarter of 2018 compared to the last quarter of 2017. Employee-related costs rose 7.8, while operational costs increased to 10.  <response>: In the first quarter of 2018, River Technologies experienced a 6.2 decline in sales from the previous quarter, while their employee-related and operational costs rose by 7.8 and 10 respectively. 