Measuring FX Rate Exposure (10 points)) Need the step by step workings please, (Refer: Chapter 10, International Financial Management)

Each quarter, your US-based company sources materials from two different countries, UK and Mexico. The company purchases 50,000 units of production inputs from Mexico at MXN 25.00/unit for its US plant. The company sources the rest of its input needs from the UK, purchasing 75,000 units at GBP1.25/unit. After production, the company ships 125,000 units of finished product back to Mexico to be sold at a price of MXN 62.50/unit. Given the variability in exchange rates in Table 1, what is the range of gross margin in USD for your company. (Gross Margin = Revenue - Cost of Goods Sold in this case.) What kind of risk is this? (Not just "currency/FX risk.")

FX Rate in USD (USD / Other Currency
Currency	Low	Current	High
GBP	0.7650	0.8500	0.9350
MXP	17.5000	19.8800	22.2500