calc(globalVars) {
    this.globalVars = globalVars;
    this.clearResult();
    if (this.hasCache()) {
      this.applyCache();
    } else {
      this.processMediaQueries();
      this.calcVars();
      this.calcStyles();
      this.calcNative();
      this.storeCache();
    }
    return this.getResult();
  }
Calculates sheet and update result
@param {Object} globalVars